This dieset is designed for use in the Rhin-O-Tuff OD4012, 4000, and 4800 Punch. These are a heavy duty 11" long binding punch that uses a heavy duty punching motor. These use the Rhin-O-Tuff EZ change-die system, and each die uses the Rhino swing-away die pin retainer allowing you to disengage any punching pin.