Our hole punch pliers will punch copper or silver as thick as 18 gauge. Round hole punch pliers are available in three sizes of 1.25mm, 1.50mm, and 1.80mm. With ergonomic handles and tempered replaceable pin, these pliers will save you time and money. The pliers are made of thick carbon steel and come with an extra replaceable pin. Additional replacement pins are available in packs of five. Length 5-1/4 (135mm).