The Osborne Forged Revolving Punch #155 is the best revolving punch made. Six tube punch made with tube sizes 1, 2, 3, 4, 5, & 6. the frame is made of forged steel, highly polished. Cutting tubes are turned from special carbon tool steel and threaded to allow easy replacement. Copper anvil. Each tube is individually hardened. The throat distance from the cutting tube to the back of jaw is 1 1/4"