Heat-treated, steel fixture makes it possible to cut screw slots precisely in the center of the head. Simplifies fitting new screws to a custom gun or recutting/repairing some on a classic. Clamping thumb screw locks the gun screw in the exact position you want; two sets of roller pins guide your saw or slotting file during cutting to produce screw slots with a look of true class. Mfg: Brownells SPECS: Heat-treated steel, black, oxide finish. 2" (5.1cm) long, 1¼" (3.2cm) wide, 7/8" (22.2mm) high. For use with .025" thick files and blades.