This dieset is designed for use in the Rhin-O-Tuff OD4012 Punch. The Rhino OD4012 is a heavy duty 11" long binding punch that uses a heavy duty punching motor. The OD4012 uses 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.