Brownells Gunsmith's Premium Hard Arkansas Stone File Set 4-Piece

The 4 most used stones/files for the working gunsmith. All angles, edges, corners are sharp, true and straight. Great for trigger and sear work! Made from first-quality, hard Ozark Quartz, with a minimum of variations within each stone. Mfg: Brownells SPECS: Set includes: A 1/4" (6.3mm) x 3" (7.6cm) Triangle; 3/8" (9.5mm) x 3/8" (9.5mm) x 3" (7.6cm) long Square; A 1/4" (6.3mm) dia. Round; 3" (7.6cm) long x 1" (2.5cm) deep Knife, 1/8" (3.2mm) wide at the back, tapering to 1/16" (1.6mm) at