The Klein Tools VDV211-038 Crimp Die Set, Hex Crimp RG58/59/62 Coaxial Cable is for use with Klein's VDV200-010 Replacement Ratcheting Crimping Frame with Hex Crimp Connectors (sold separately). The Klein Tools VDV211-038 is made from induction hardened high-carbon steel for durability and long life. This unit is also designed to be easy to change from one to the next and for multiple uses.