Uses interchangeable, 1-1⁄4" long, slip-in muzzle pilots that keep its blades exactly perpendicular to the bore axis. Actually faces-off and squares-up barrel muzzles after shortening, prior to crowning. Ideal for removing dings or damage from flat faced (not rounded), rifle and handgun muzzles. Mfg: Brownells SPECS: Cutter - 3-1⁄4" (8.2cm) long (except .17 caliber cutter - 2-3⁄8" (6cm) long. Diameter - 1" (2.5cm) or .750" (19mm). Hardened steel cutter.