Cutting tubes are threaded to allow easy replacement. The tubes are individually hardened. The reach distance from the cutting tube to the back of the jaw is 1 1/2"., #155 Revolving Punch is a heavy duty punch with replaceable anvil and cutters. Strong metal construction. It comes complete with six sizes of cutters installed. Anvils and dies to replace the originals when they eventually wear out are available.
Revolving punch for professional and industrial use., Useful for everything from punching holes for setting fasteners to holes at the ends of cuts in vinyls to minimize the chances of tearing. (This is a process recommended by Naugahyde, and is a good idea for any material that has a tendency to rip.)