StewMac Deadblow Fretting Hammer - No-Bounce Fret Installation

In this review the StewMac Deadblow Fretting Hammer is examined for luthiers and hobbyists who want faster, more reliable fret seating. The bottom line: this is a specialized tool that consistently reduces rebound and concentrates energy on the fret, making installations quicker and cleaner than with a standard hammer. Its machined brass convex face and shot-filled, no-bounce head are the single biggest reasons to buy, since they help seat frets firmly with fewer blows and less risk of springback during planting.

Key Features

• No-bounce deadblow head: The shot-filled, shock-absorbing head transfers more energy to the fret and minimizes rebound for firmer seating with fewer strikes.
• Machined brass convex face: The convex striking surface is shaped specifically for fretwork, helping to apply force evenly across the fret crown without marring the board.
• Steel-reinforced handle: A durable steel reinforcement in the handle improves longevity and resists flex during repeated use.
• Works on stainless frets: Suitable for modern, harder stainless-steel fretwire so it handles a range of materials used in contemporary builds and refrets.
• Compact size and weight: At roughly 9-1/2 in overall length and 1/2 lb weight, it balances control and impact for hand work at the nut and frets.

Who It's For

The hammer is aimed at luthiers, repair techs, and serious DIYers who install or replace frets regularly and want a repeatable, low-rebound striking tool. It's particularly useful when working on delicate fingerboards where minimizing hammer bounce reduces the chance of frets springing back or damaging the edge seating.

Those who seldom do fretwork or who prefer pneumatic press-style fret installation might look elsewhere; this is a hand tool optimized for controlled blows and benefit grows with repeated use and familiarity with fret planting technique.

Pros & Cons

Pros

• Shot-filled head reduces bounce so more force goes into seating the fret.
• Brass convex face is machined for fretwork and helps distribute impact properly.
• Steel-reinforced handle adds durability for workshop use.

Cons

• Not intended to replace a press for large-volume shops; best for hand fretting tasks.
• The compact 9-1/2 in length gives less reach than larger hammers for some setups.

Specifications

Overall length	9-1/2 in (241.3 mm)
Weight	1/2 lb (0.2268 kg)
Striking surface diameter	13/16 in (20.64 mm)
Face material	Machined brass convex face
Handle	Durable steel-reinforced handle
Compatibility	Suitable for stainless-steel fretwire

Our Verdict

The StewMac Deadblow Fretting Hammer is a sensible investment for luthiers and hobbyists who do hand fretting and want to reduce rebound and work faster. Its deadblow design and brass convex face deliver more direct energy to the fret, making installations cleaner and more consistent, so it represents good value for anyone serious about fretwork.

Frequently Asked Questions

Can this hammer be used on stainless frets?
Yes. The tool is suitable for use on stainless-steel fretwire as noted, so it handles harder modern fret materials.

What size is the striking face?
The striking surface diameter is 13/16 in (about 20.64 mm), machined in a convex shape for fretwork.

Is this a full replacement for a fret press?
No. This deadblow hammer is ideal for hand planting and small jobs; high-volume shops may still prefer a press for large refrets.