Revolving carbon steel head with 6 punch sizes contained within a pressed steel frame. Spring-loaded handle for repetitive use. Simply rotate the head to choose from 2, 2.5, 3, 3.5, 4 or 5 mm. punch sizes. Revolving carbon steel head with 6 punch sizes 2, 2.5, 3, 3.5, 4, & 5 mm. Strong gauge pressed steel frame & spring loaded for ease of use.