Hosel brush size guide questions usually come from DIY club builders who are ready to clean out old epoxy, but are not sure which wire brush will actually fit their driver, fairway wood, iron, wedge, or shaft adaptor.
Choosing the wrong hosel cleaning brush can create two problems. If the brush is too small, it barely touches the bore wall and leaves old epoxy behind. If the brush is too large, it can bind, chatter, flatten quickly, or score the hosel wall more aggressively than needed.
The most common sizing confusion is 9mm vs .335. A 9mm brush is about .354″, so it is much closer to a .355 taper-tip iron hosel than a .335 wood hosel. For drivers and fairway woods, you usually want a smaller brush matched to .335 or .350 bores. For irons and wedges, you usually want a brush that works with .355 taper or .370 parallel hosel bores.
This guide explains which hosel cleaning brush fits woods, irons, wedges, and adaptors, why multi-packs are usually smarter, and how to avoid buying a brush that looks close on Amazon but does not clean the bore correctly. For the main tool guide, read our hosel cleaning brush drill bit article. For the cleaning technique, see our how to prep a golf club hosel for new epoxy guide. For broader tool options, read our best golf club hosel brushes guide.
Quick Verdict
The best hosel cleaning brush size depends on the club type. Drivers and fairway woods commonly use .335 or .350 brush sizing. Irons and wedges commonly use .355 taper or .370 parallel brush sizing. A 9mm brush is close to .355, but .370 is closer to 9.4mm, so do not assume every 9mm brush is ideal for every iron hosel.
For most DIY golfers, the safest buy is a golf-specific hosel brush multi-pack with separate brushes for wood and iron bores. Brushes are consumables. Wire bristles flatten, wear, and lose cleaning bite after repeated use, especially when removing cured epoxy from a full iron set.
The smartest rule is simple: match the brush to the hosel bore, use low drill speed, clean with short in-and-out passes, follow with a solvent swab, and replace the brush once the bristles flatten or stop contacting the bore wall evenly.
Hosel Cleaning Brush Size Chart
| Club Type | Common Bore / Tip Size | Approximate Metric Size | Best Brush Choice | Main Warning |
|---|---|---|---|---|
| Driver | .335″ | About 8.5mm | .335 wood hosel brush | 9mm brush may be too large |
| Older or stronger fairway woods | .350″ | About 8.9mm | .350 wood hosel brush | Check adaptor or head specs first |
| Taper-tip irons | .355″ | About 9.0mm | 9mm or .355-compatible iron brush | Do not force into tight bores |
| Parallel-tip irons and wedges | .370″ | About 9.4mm | .370 iron brush | 9mm may clean lightly but may not fully contact the wall |
| Hybrids | Often .370 or model-specific | About 9.4mm if .370 | Check club specs before buying | Hybrid hosels vary more than golfers expect |
| Shaft adaptors | .335, .350, or model-specific | Varies | Smaller brush or nylon brush | Aggressive wire can damage delicate adaptors |
9mm vs .335: Why the Difference Matters
A 9mm hosel brush is roughly .354″, which makes it close to a .355 taper-tip iron bore. A .335 wood bore is smaller, about 8.5mm. That difference may look small on paper, but inside a hosel it matters.
If you force a 9mm brush into a .335 driver hosel or adaptor, the brush can bind, chatter, flatten, or scratch more aggressively than needed. It may also give you poor control with a drill because the bristles are compressed too tightly.
For drivers and fairway woods, use a wood-specific brush. For irons and wedges, use an iron-specific brush. That simple separation avoids most sizing mistakes.
.335 and .350 Hosel Brushes for Drivers and Fairway Woods
Drivers and fairway woods commonly use smaller shaft tip and bore sizes than irons. Many modern drivers use .335, while some woods or older models may use .350. That means a brush designed for irons may be too large for wood heads and adaptors.
A correctly sized wood hosel brush should contact the bore wall without needing to be forced. It should clean old epoxy and residue while still spinning smoothly at low speed.
Wood heads and adaptors can also be more delicate than simple steel iron hosels. When in doubt, use a smaller brush, nylon brush, or hand chuck instead of an aggressive oversized wire brush in a drill.
.355 and .370 Hosel Brushes for Irons and Wedges
Irons and wedges usually fall into .355 taper-tip or .370 parallel-tip territory. A 9mm brush is close to .355, while a .370 brush is closer to 9.4mm. Some flexible wire brushes may clean both, but the fit will not feel identical.
For a .355 taper-tip hosel, the brush should clean without feeling jammed. For a .370 parallel hosel, a true .370 brush may contact the bore wall better than a 9mm brush. If the brush feels too loose, it may spin without removing enough epoxy film.
This is why multi-packs are practical. A full set of irons may have stubborn epoxy in some heads and lighter residue in others. Having fresh brushes in the correct size saves time and helps avoid overusing one flattened brush across the whole set.
Best Hosel Brush Sizes and Buying Options
These are the most useful buying options for golfers choosing a hosel brush size. Each recommendation has its own rounded yellow Amazon button and a specific use case.
1. Hosel Cleaning Brush Multi-Pack
Best for: DIY builders who work on both woods and irons or plan to clean a full set.
A hosel cleaning brush multi-pack is the best buy for most golfers because it gives you more than one size and more than one fresh brush. That matters when you are cleaning a driver adaptor, a fairway wood, and a set of irons in the same project.
Brushes wear out. The bristles flatten after repeated contact with cured epoxy, especially if you are cleaning a full set of eight irons. Once the brush loses bite, it may still spin, but it will not scrub the bore wall effectively.
Choose a multi-pack that clearly lists sizes for wood and iron hosels. Avoid vague listings that only say “golf wire brush” without diameter information.
Pros
- Best value for full-set reshafting projects.
- Includes replacement brushes when bristles flatten.
- Reduces the chance of forcing the wrong size brush.
- Useful for woods, irons, wedges, and adaptors.
Cons
- Costs more than a single brush.
- Some generic packs may not list exact golf bore sizes.
- You may not use every brush in the pack immediately.
Buy it if: You want the safest all-around option for multiple club types and full-set work.
Avoid it if: You only need one exact brush size for one known hosel bore.
2. .335 Wood Hosel Cleaning Brush
Best for: Most modern driver hosels and .335 shaft adaptors.
A .335 wood hosel brush is the correct direction for many modern drivers. It is smaller than a 9mm iron brush and better suited to the tighter bore found in many wood heads and adjustable adaptors.
Use this brush when cleaning old epoxy from a driver head, driver adaptor, or smaller fairway wood bore. Work slowly and avoid forcing the brush because wood heads and adaptors can be less forgiving than steel iron heads.
If you also need the full cleaning process, use this with the technique in our how to prep a golf club hosel for new epoxy guide.
Pros
- Better fit for many driver hosels.
- Safer than forcing a 9mm iron brush into a wood bore.
- Useful for .335 shaft adaptors.
- Good choice for precise wood reshafting prep.
Cons
- Too small for many iron hosels.
- May not clean .370 bores effectively.
- Can still damage adaptors if used too aggressively.
Buy it if: You clean driver hosels, .335 wood heads, or .335 shaft adaptors.
Avoid it if: You mainly work on irons and wedges with .355 or .370 bores.
3. .350 Wood Hosel Cleaning Brush
Best for: Fairway woods, older wood heads, and .350 bore projects.
A .350 hosel brush sits between the common .335 wood size and the .355 iron taper size. It can be useful for certain fairway woods, older woods, and heads that specifically list a .350 bore.
This is not a brush to guess with. If the head is .335 and you use a .350 brush aggressively, you may compress the bristles too much and lose control. If the bore is .350, the fit should feel more natural.
Choose this brush when you know the bore is .350 or when your multi-pack includes a labeled wood-size brush designed for .350 use.
Pros
- Useful for .350 wood hosels.
- Good middle size between .335 and .355.
- Helpful for older wood or fairway wood projects.
- Can clean more effectively than a too-small .335 brush in a .350 bore.
Cons
- Not as common as .335 for modern drivers.
- Can be too tight in smaller adaptors.
- Still not the best brush for .370 iron bores.
Buy it if: You know your wood or fairway wood hosel is .350.
Avoid it if: You are only guessing based on appearance and have not checked the bore size.
4. 9mm or .355 Iron Hosel Cleaning Brush
Best for: .355 taper-tip irons and wedges where a 9mm brush gives a close fit.
A 9mm brush is close to .355, which makes it useful for many taper-tip iron hosels. This is often the size golfers see on Amazon listings because 9mm is an easier metric label than .355.
The important detail is that 9mm is not the same as .370. It may still clean some .370 bores lightly if the bristles flex, but it may not contact the wall as aggressively as a true .370 brush.
Use a 9mm brush for .355 taper-tip irons, controlled cleaning, and moderate epoxy residue. If the bore feels loose around the brush, move to a .370 brush for parallel-tip irons.
Pros
- Close fit for .355 taper-tip iron hosels.
- Common size in Amazon listings.
- Useful for irons and wedges with taper-tip bores.
- Good option for moderate epoxy cleaning.
Cons
- Too large for most .335 driver hosels.
- Not exactly the same as .370.
- May clean .370 bores less aggressively than a true .370 brush.
Buy it if: You are cleaning .355 taper-tip irons or want a 9mm brush for close iron-hosel work.
Avoid it if: You need a brush specifically for .335 wood bores or true .370 parallel iron hosels.
5. .370 Iron and Wedge Hosel Cleaning Brush
Best for: .370 parallel-tip irons, wedges, hybrids, and larger iron bores.
A .370 hosel brush is the better choice when the bore is larger than a .355 taper-tip iron. It gives stronger wall contact in .370 parallel bores and can remove epoxy film more effectively than a smaller 9mm brush.
This size is common for many component iron heads, some wedges, and some hybrids. Always check the clubhead or shaft specs before assuming .370, especially on major OEM irons that may use .355 taper-tip shafts.
Use light pressure and low drill speed. A larger brush has more contact area, so it can also generate more friction if you let it sit spinning in one spot.
Pros
- Better contact in .370 iron and wedge bores.
- Good for parallel-tip component heads.
- Useful for full-set iron reshafting.
- Removes epoxy film more effectively than undersized brushes.
Cons
- Too large for .335 driver bores.
- May be too aggressive in tight .355 taper bores.
- Can create heat if used too long in one spot.
Buy it if: You work on .370 parallel irons, wedges, or hybrids and need stronger bore-wall contact.
Avoid it if: You mainly clean .335 woods, .350 woods, or tight taper-tip iron hosels.
6. Nylon Bore Brush for Final Cleaning
Best for: Final passes, delicate adaptors, and cleaning after the wire brush has done the heavy work.
A nylon bore brush is not the strongest epoxy-removal tool, but it is useful after the metal brush has already removed the hard residue. It gives you a gentler way to sweep out dust and lightly scrub delicate bores.
This is a smart add-on when you work on adjustable shaft adaptors, lightweight heads, or any component where you want less abrasion than stainless wire.
Follow nylon brushing with a Q-tip or cotton swab dampened with alcohol or acetone so the bore is clean before epoxy.
Pros
- Gentler than wire brushes.
- Useful for final cleaning.
- Better for delicate adaptors and light residue.
- Lower risk of scoring the bore wall.
Cons
- Not strong enough for heavy cured epoxy by itself.
- Can wear quickly under drill use.
- Still needs solvent swabbing for final residue removal.
Buy it if: You want a gentler follow-up brush after wire cleaning.
Avoid it if: You need to strip hard cured epoxy from multiple iron hosels quickly.
Why a Multi-Pack Is Usually Smarter
Hosel cleaning brushes are consumables. The bristles flatten, bend, collect epoxy dust, and lose their cleaning edge after repeated use. If you are cleaning one driver adaptor, one brush may be fine. If you are cleaning a full iron set, one brush may not stay sharp through the whole job.
A multi-pack also protects you from sizing mistakes. Instead of forcing a 9mm brush into a wood bore or using a .335 brush in a .370 iron, you can choose the brush that actually fits the hosel.
For full-set work, having at least one wood-size brush, one iron-size brush, one backup brush, and a softer final-cleaning tool is more practical than trying to make one brush do every job.
How to Check Which Hosel Brush Size You Need
The easiest way is to check the clubhead or shaft tip specs before buying. If you know the shaft tip size, the hosel bore is usually matched to that general category.
Use .335 or .350 for woods when the head or adaptor calls for that size. Use .355 or .370 for irons and wedges depending on whether the shaft is taper tip or parallel tip.
If you do not know the specs, use a caliper, check the manufacturer’s shaft information, or ask a club builder before forcing a brush. A brush should feel like it is cleaning the wall, not getting jammed into a bore that is too small.
The Simple Brush Fit Test
- Insert the brush by hand before connecting the drill.
- Feel whether the bristles contact the wall without binding.
- Pull the brush out and inspect whether the bristles are crushed or evenly flexed.
- Use the drill only after the brush passes the hand-fit test.
- Use low speed and short in-and-out passes.
- Stop if the brush grabs, chatters, or removes visible metal.
This quick test prevents most beginner mistakes because it tells you whether the brush is obviously too large before power is added.
When to Replace a Hosel Cleaning Brush
Replace the brush when the bristles flatten, bend backward, stop contacting the bore wall, or shed wire fragments. A worn brush may still spin, but it no longer cleans efficiently.
For a full set of eight irons, expect brush wear. Some brushes may last longer than three to five clubs, while cheaper brushes may flatten faster when used on stubborn cured epoxy.
The practical sign is cleaning performance. If you are using more pressure to get the same result, the brush is probably worn or undersized.
How TopGolfe Evaluates Hosel Brush Size
For hosel brush sizing, we evaluate fit before aggression. A good brush should contact the bore wall evenly, remove epoxy film, and leave the hosel ready for swabbing without enlarging the bore or damaging the fit.
We look at brush diameter, bristle stiffness, drill compatibility, stem length, whether the brush is labeled for woods or irons, and how quickly the bristles flatten during repeated use.
The best brush is not always the stiffest one. It is the size and material that cleans the bore thoroughly while preserving the shaft fit and epoxy bonding surface.
Why Brush Size Affects Epoxy Bond Quality
Epoxy bond strength depends on clean contact between the prepared shaft tip and the inside of the hosel. If the brush is too small, old epoxy film can remain on the bore wall. If the brush is too aggressive, it can damage the bore or create loose metal dust.
After brushing, always use a cotton swab with 91% isopropyl alcohol or acetone to remove microscopic residue. Let the hosel dry fully before mixing epoxy.
For the next steps, read our golf club epoxy mixing cups, golf ferrule kit, and golf club ferrule tool guides.
Common Hosel Brush Sizing Mistakes
Assuming 9mm Fits Everything
A 9mm brush is close to .355, not .335 and not exactly .370. It can be useful for taper-tip irons, but it is not a universal golf hosel brush.
Using an Iron Brush on a Driver Hosel
An iron brush can be too large for a .335 driver or adaptor. Use a wood-size brush when cleaning drivers and fairway woods.
Using a Worn-Out Brush
Flattened bristles do not clean the bore wall effectively. Replace brushes when they lose bite instead of pressing harder.
Buying Vague Brush Listings
A listing that does not show diameter, intended club type, or drill compatibility creates sizing risk. Choose clearly labeled brushes whenever possible.
Forcing the Brush Into the Hosel
A hosel brush should fit with bristle flex, not brute force. Forcing the brush can damage the bore or flatten the bristles before the job starts.
Skipping the Solvent Swab
Even the right brush can leave dust behind. Swab the bore before epoxy so the adhesive bonds to clean material, not loose residue.
What Not to Buy
Avoid single-size brush listings that do not say whether the brush is for woods or irons. Golf hosels are not all the same diameter.
Avoid assuming “9mm golf brush” means it will clean every iron and wood. It is close to .355, but too large for many .335 wood bores and not exactly a .370 brush.
Avoid oversized brushes that must be forced into the bore. A brush that starts too tight can create chatter, heat, and unnecessary scoring.
Avoid cheap brushes that shed bristles easily. Loose wire fragments inside the hosel create a new contamination problem before epoxy.
Avoid using one worn brush for a full iron set if the bristles are already flattened. A fresh brush is cheaper than a weak epoxy bond.
Hidden Costs to Consider
- Replacement brushes: Wire bristles flatten after repeated epoxy removal.
- Multiple sizes: Woods, irons, wedges, hybrids, and adaptors may need different brushes.
- Solvent and swabs: Brushing alone does not remove microscopic dust.
- Epoxy supplies: Cleaning the bore is only one part of the reshafting workflow.
- Ferrules: Many reshafting jobs require new ferrules after prep.
- Professional help: Expensive heads, stuck shaft tips, or uncertain bore sizes may justify a club builder.
Safety Notes Before Using Hosel Brushes
- Wear safety glasses when using drill-powered brushes.
- Use low speed and light pressure.
- Check brush fit by hand before using a drill.
- Do not inhale epoxy dust or graphite dust.
- Keep acetone and alcohol away from flames, sparks, children, and pets.
- Let solvent evaporate fully before applying epoxy.
- Stop if the brush grabs, chatters, or removes visible metal from the bore.
Frequently Asked Questions
What size hosel cleaning brush do I need?
You need a brush that matches the hosel bore. Drivers and fairway woods commonly use .335 or .350 brushes. Irons and wedges commonly use .355 or .370 brushes, depending on shaft tip and hosel design.
Is 9mm the same as .335?
No. 9mm is about .354″, so it is much closer to .355 than .335. A 9mm brush is usually too large for many .335 driver hosels and adaptors.
Is 9mm the same as .370?
No. 9mm is about .354″, while .370 is about 9.4mm. A 9mm brush may clean some .370 bores lightly, but a true .370 brush usually gives better bore-wall contact.
What brush fits a driver hosel?
Many driver hosels and adaptors use .335 sizing, while some woods may use .350. Use a wood-specific hosel brush rather than a 9mm iron brush.
What brush fits iron hosels?
Many irons use .355 taper-tip or .370 parallel-tip sizing. A 9mm brush is close to .355, while a .370 brush is better for true .370 parallel bores.
Do hosel cleaning brushes wear out?
Yes. Wire hosel brushes wear out as bristles flatten and bend from cured epoxy. Replace the brush when it stops cleaning effectively or starts requiring extra pressure.
Should I buy a hosel brush multi-pack?
Yes, a multi-pack is usually smarter if you work on more than one club type or plan to clean a full iron set. It gives you multiple sizes and backup brushes when bristles flatten.
Can I use a hosel brush to enlarge the bore?
No. A hosel brush is for cleaning, not resizing. If the bore needs to be enlarged, that is a reaming job and requires the correct reamer, technique, and caution.
Final Recommendation
If you need a practical hosel brush size guide, remember the simple split: .335 and .350 are generally wood-side brush sizes, while .355 and .370 are generally iron and wedge-side brush sizes. A 9mm brush is close to .355, but it is not the same as .335 or .370.
For most DIY builders, the best choice is a golf-specific hosel cleaning brush multi-pack with wood and iron sizes. Brushes wear out, and a full set of irons can flatten bristles faster than one single repair.
The best brush is the one that fits the bore without force, cleans the wall without chatter, and leaves the hosel ready for a solvent swab and fresh epoxy. Match the size first, then worry about drill speed, solvent, ferrules, and final assembly.
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