Lym Brass Smith Die Wrench

The Lyman Brass Smith Die Wrench is a purpose-built tool that simplifies die nut adjustment during reloading setup and maintenance. Whether you're working with standard Lyman dies, Pro dies, or cross-platform Dillon equipment, this die wrench handles the fasteners you actually encounter at the press. The closed-end design — a key feature over open wrenches — provides solid torque transfer with minimal flex, and its thinner profile lets you access nuts nestled between dies without the typical binding that comes with bulkier tools.

Made from stainless steel, the Brass Smith Die Wrench resists corrosion in the reloading bench environment where moisture and brass dust accumulate. Five built-in openings cover the full range of Lyman fastener sizes: the 1 3/16" and 1" hex lock nuts (the latter fitting both standard and Pro dies, plus Dillon dies), plus the smaller 3/4", 5/8", and 3/8" nuts used on expander plugs, seating screws, and decapping rod assemblies. No hunting through a drawer for the right open-end wrench, and no improvising with pliers that mar your expensive dies.

If you're running a multi-die setup or swapping dies frequently, this wrench becomes indispensable. It cuts assembly and adjustment time, and the robust construction means you won't hesitate to apply the torque needed for a secure, properly-seated die assembly.

Key Features

• Five wrench openings covering all standard Lyman die nut sizes
• Closed-end design for superior strength and torque control
• Thinner walls fit easily between dies without obstruction
• Stainless steel construction resists corrosion
• Compatible with Lyman standard dies, Pro dies, and Dillon dies

Specifications

Frequently Asked Questions

Does this wrench work with Dillon dies?

Yes. The 1" opening fits Dillon hex die lock nuts. The other four openings handle Lyman-specific fasteners on expander plugs, seating screws, and decapping rods.

What fasteners does this wrench cover?

The five openings accommodate die lock nuts in 1 3/16" and 1" sizes, expander plug lock nuts at 3/4", seating screw lock nuts at 5/8", and decapping rod lock nuts at 3/8".

Why is the closed-end design better than an open wrench?

Closed-end wrenches distribute torque more evenly and resist bending under load, which matters when seating dies that need solid, consistent pressure. The design also prevents slipping off fasteners during adjustment.