These dies are made specifically for the Rhin-O-Tuff HD7700 Ultima heavy duty modular punch and are available in virtually any punching pattern you can imagine. In fact, these dies are made right here in the USA and Rhino actually has the ability to produce custom punching patterns if you need them (if you can imagine it they can probably do it). The HD7700 is one of the strongest desktop punches available on the market with a capacity of up to 50 sheets with certain hole patterns. For that reason, the dies have be built with strength and precision in order to stand up to the test of time. Compatible with both the horizontal and vertical versions of the punch they also work in the older putty colored units as well as the newer Onyx series. Choose the die set for your particular application and start punching today.