Black C4 punch is made in a very intricate manner using 410HC stainless steel. This particualr replaceable part caters to the MUT EOD and Super Tool 300 EOD, but will inturn cling onto the original MUT model instead of the firearm disassembly punch. However, when clung onto the regular MUT, it does not seat flush with the side of the tool in any manner whatsoever. Grab this product to give yourself that extra edge!