Considered the standard gunsmithing file. "Safe" on both edges so you can cut right up to faces without undercutting the sides of your work. Swiss Pattern. Mfg: Grobet File Co. Of America Inc SPECS: 8" (20.3cm) long. #00 Cut 9/32" (7.1mm) wide. 9/64" (3.6mm) thick. #0, #2, #4 Cut 5/16" wide. 9/64" thick. All A taper slightly in thickness.