This die holder allows you to automatically center your dies under the ram of the arbor press to fold and reduce coin rings. After you position the holder so the ram is centered over the die, the magnets keep it in place so you can quickly switch out dies and press without realigning. It fits the JasonsWorks dies (reduction and swedish wrap) and is designed to work with the Central Machinery 1 ton arbor press from Harbor Freight. Arbor press, dies, and push follower not included.