Easy-to-use, hand-held tool retains the sear and positions it so you can stone the contact surfaces at the correct angles to produce a smooth, clean-breaking trigger free from unwanted creep. Helps you produce precise, mirror-finish surfaces for complete, full-width contact with the hammer to ensure reliable ignition while preserving proper operation of the thumb safety. Raising or lowering the fixture’s setscrew lets you change sear angle. Fixture body is machined from solid carbon steel for years of service without loss of alignment. Includes a hardened, stainless steel .020' thick shim that prevents you from removing too much material from the sear, and protects the fixture body from wear. SPECS: Steel, black oxide finish. 3?” (8.3cm) long, ?” (1.9cm) wide. Includes .020” thick stainless steel shim and instructions.