Quickly and easily punch precision bolt holes in flange gaskets. Select the desired diameter cutting head (1/8” to 2” standard) or (2mm to 50mm metric), mount on handle, position on gasket material, and strike! Patented locking system allows rapid interchange of cutting heads. Unique design punches single diameter holes (bolt holes) as well as dual diameter rings (washers) in one operation. Hardened steel cutting heads stay sharp. Available in 11 piece, 16 piece and 31 piece kits, as well as individual punches.