Claw Hammers: Which Weight, Which Handle, and How to Actually Use One

A bent nail is a small thing. Bending six in a row because you're gripping the handle wrong, striking with the edge of the face, or using a hammer that's too heavy for the job turns a ten-minute task into a frustrating half-hour. Worse, a glancing blow that misses the nail entirely can split the timber you're fixing, damage a finished surface, or catch your thumb. The claw hammer is the simplest tool on any build, and the one most people use badly.

What it is and when you need one

A claw hammer has two ends. The flat face drives nails. The curved claw on the back levers them out. That's the entire design, unchanged for centuries, because it works.

You'll reach for a claw hammer during almost every phase of an extension or renovation. Setting out profiles on timber stakes. Nailing stud wall frames together. Fixing door linings. Tapping kitchen units into alignment. Driving in fixing nails for skirting boards. Pulling out bent nails and temporary fixings. It's not a specialist tool, it's the default.

Don't confuse it with a club hammer. A club hammer has a short handle, a heavy double-faced head, and no claw. It's for hitting chisels and doing light demolition. Swing a claw hammer at a bolster chisel and you'll damage the claw hammer's face and send the chisel sideways. Different tool, different job.

Types and variants

The differences between claw hammers come down to two choices: head weight and handle material. Get both right for your use and you'll barely notice the tool in your hand. Get them wrong and you'll feel it in your wrist by lunchtime.

Weight: 16oz vs 20oz

A 16oz (450g) hammer is lighter, easier to control, and better for precise work. Hanging doors, fitting skirting, driving small nails, kitchen installation. For most homeowner tasks on an extension project, 16oz is right.

A 20oz (570g) hammer drives nails faster with less effort on each swing because the heavier head does more of the work. If you're regularly driving 75mm nails into softwood framing for stud walls, 20oz saves your arm. But it's noticeably heavier for extended use, and the extra momentum makes a missed strike more damaging.

Both sizes cost roughly the same. A pair of Stanley fibreglass hammers (one 16oz, one 20oz) runs about £25total from Screwfix or Toolstation. If budget allows, own both. Use the 16oz as your everyday hammer and the 20oz when you're nailing heavy timber.

Handle material

This matters more than most buyers realise, particularly for vibration and comfort during extended use.

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Fibreglass handles are the right default for most homeowners. They absorb enough vibration to be comfortable for a full day's work, they don't rot or warp if left in the rain, and the head is moulded permanently into the handle so it can't fly off. Non-conductivity is a bonus if you're anywhere near first-fix electrics.

Wooden (hickory) handles absorb the most vibration and feel the most natural in hand. Professional joiners who swing a hammer hundreds of times a day often prefer them for joint health. The trade-off: hickory dries out, shrinks slightly, and the head gradually loosens. Check the wedge periodically, and don't leave a wooden-handled hammer outdoors.

One-piece steel hammers (Estwing is the benchmark) are forged from a single bar of steel, head to handle. Nothing can break. Nothing can come loose. They'll outlast you. But they transmit every strike directly into your wrist and elbow. Forum users describe extended sessions with an Estwing as causing "Estwing Elbow", a repetitive strain problem. For occasional DIY use, this isn't an issue. For a week of stud wall construction, it is.

Curved claw vs straight claw

Most claw hammers sold in the UK have a curved claw. The curve gives better prying force for pulling nails, which is what homeowners do most. Straight (rip) claws are found on framing hammers and are better for prying boards apart during demolition. For a homeowner, curved is the standard choice.

How to use it properly

This is where most guides stop at "hit the nail." That's like saying the way to drive a car is "press the pedal." Technique prevents bent nails, sore arms, and damaged surfaces.

Grip

Hold the handle near the end, not choked up near the head. Your hand should be in the bottom third of the handle. Gripping near the head gives you more control but far less power, and forces your wrist to do work that the handle's length should be doing. The further from the head you hold, the more the tool's design works in your favour.

Don't death-grip the handle. A firm but relaxed hold lets the hammer swing naturally. Squeezing too tightly tenses your forearm and accelerates fatigue.

The swing

Let the hammer head do the work. A claw hammer isn't a tennis racquet. You don't need to muscle it into the nail with arm strength. Lift the hammer by hinging at the elbow, then let it fall under its own weight with a wrist snap at the bottom of the arc. The weight of the head provides the force. Your job is to guide it accurately.

Start a nail with light taps to set it into the wood, holding the nail between thumb and forefinger near its head. Once it's standing on its own (after two or three taps), move your fingers clear and strike with full swings.

Striking the face

The hammer's face should hit the nail head squarely and flat. Glancing blows bend nails because the force goes sideways instead of straight down. If you're consistently bending nails, check two things. First, are you watching the nail head at the moment of impact? Look at where you want to hit, not at the hammer. Second, is the face clean? A polished, smooth face grips the nail head better than a face caked in plaster or rust.

Pulling nails

Slide the claw under the nail head and rock the hammer back, using the curve of the claw as a fulcrum. For long nails that don't come out in one pull, slip a thin piece of scrap timber under the hammer head before the second pull. This raises the fulcrum point, gives you more prying force, and prevents the claw from digging into the surface you're protecting.

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The nail punch pairing

For any finish carpentry (skirting boards, door architraves, kitchen trim), a claw hammer alone isn't enough. You need a nail punch (also called a nail set), a small steel rod that lets you drive a nail head below the wood surface without the hammer face marking the timber. Place the punch on the nail head, tap it with the hammer, and the nail sinks 1-2mm below the surface. Fill the hole, sand it, and the fixing is invisible.

Nail punch sets cost around £5 – £9 for three sizes. Keep one in your pocket whenever you're doing finish nailing.

How to check quality

A claw hammer doesn't need the calibration checks that a spirit level does, but you can spot a good one from a poor one in seconds.

Head attachment. Grip the handle and shake the hammer firmly. Any looseness, any rattle, means the head isn't properly secured. On a new hammer, this is a manufacturing defect. Return it. On an older wooden-handled hammer, the head has loosened and the wedge needs replacing.

Face quality. The striking face should be smooth, slightly convex (crowned), and free of pitting. A crowned face centres the force on the nail head and reduces glancing. Flat-faced hammers exist but are less forgiving of off-centre strikes.

Handle straightness. Sight down the handle from the head end. It should be straight and the head should sit square to the handle axis. A misaligned head means the face won't hit flat, no matter how good your technique.

Balance. This is subjective but real. Hold the hammer at arm's length by the handle end. Swing it gently. A well-balanced hammer feels like the head follows the handle naturally. A badly balanced one feels top-heavy and unwieldy. If you can, handle hammers in a shop before buying.

What to buy

Three tiers, and honest recommendations at each.

Budget: £5 – £15

The Stanley Fibreglass Claw Hammer (16oz at around £1220oz at around £13from Screwfix or Toolstation) is the most recommended budget hammer across every UK DIY forum. Decent shock absorption, good balance for the price, and community reports of 8-10 years of regular DIY use without issues. This is the one to buy if you want a reliable hammer without spending more than £15.

Below Stanley, the Screwfix Essentials and Toolstation Olympia ranges start from £5. These are adequate for occasional use (hanging a picture, assembling flat-pack) but lack the balance and face quality that make sustained nailing comfortable. The Magnusson range at £9 – £12 earned a "Best Value" award from BBC Gardeners' World Magazine, and sits between the store-brand budget options and Stanley.

Mid-range: £20 – £35

This is where better engineering shows up. The Roughneck Gorilla V-Series (£23 – £34 depending on size and retailer) has a twin-girder anti-vibration system, a magnetic nail starter (genuinely useful for one-handed work on ladders), and a 25-year warranty. It's a serious hammer at a fair price.

The Stanley FatMax (£29 – £32) uses one-piece steel construction with a "tuning fork" anti-vibration design in the handle. Better vibration damping than a standard Estwing at a lower price point. The Draper Expert 16oz (£15 – £19) packs surprising power for its weight and earned "Most Versatile" from tested reviews.

The DEWALT XP at £35sits at the top of this tier. Forum users praise its balance and nail-pulling ability specifically.

Pro: £40 – £60

Estwing. The name comes up in every UK trade forum discussion about hammers. One-piece forged steel, made in Rockford, Illinois, with a reputation built over decades. The Estwing Curved Claw 20oz runs £49 – £55 depending on retailer. Forum users report owning them for 30+ years. The build quality is objectively excellent.

The trade-off, as covered above, is vibration. For a homeowner who uses a hammer a few times a month, this won't matter. For anyone doing sustained daily nailing, the Estwing Sure Strike range (£20 – £43) offers Estwing head quality with a fibreglass handle that absorbs more shock.

Alternatives

A claw hammer is the right tool for driving and pulling nails in timber. But it's the wrong tool for several tasks that homeowners commonly misuse it for.

Club hammer - for hitting bolster chisels, cold chisels, and doing light demolition on masonry. The double-faced head is designed for striking hardened steel tools. A claw hammer's face isn't, and using one on a chisel risks chipping the face and sending steel fragments at your eyes.

Rubber mallet - for tapping things into position without marking them. Kitchen unit adjustments, assembling furniture, seating paving slabs. A claw hammer will dent or crack anything it hits directly.

Ball-pein hammer - for metalwork. Not needed on a typical extension project.

Where you'll need this

Claw hammers appear across nearly every phase of an extension or renovation project:

• Walls and blockwork - nailing timber plates, fixing temporary bracing, tapping blocks into position with a handle tap
• Foundations and footings - driving stakes for setting-out profiles, fixing formwork boards
• First fix electrics - nailing cable clips, marking positions, fixing back boxes to timber studs
• First fix plumbing - nailing pipe clips, fixing noggins between studs
• Kitchen installation - tapping units into alignment, fixing trim, nailing fillers
• Snagging checklist - checking fixings, testing for loose fittings, minor corrections

Safety

Never use a claw hammer with a damaged or loose head. Check wooden handles for cracks before each use. If the head has any play at all, stop and fix or replace the hammer. A head that flies off mid-swing is a serious hazard to everyone nearby.

Keep the striking face clean. Plaster, concrete dust, and rust on the face increase the chance of glancing blows. A quick wipe with a rag before use takes two seconds.