The contractor's choice -worldwide | Unique punch profile also splits slugs for easier slug removal | Use with battery-powered, hydraulic, ratchet or manual drivers | Can be used on mild steel up to 10 gauge | Punch unit sets include punch, die, and draw studAmazon.ca Product Description Greenlee Slug-Busters can be used on mild steel up through 10 gauge (3.5 mm). Application: Punch mild steel, aluminum, fiberglass and plastic. Operates with battery, hydraulic, ratchet or manual drivers. From the Manufacturer Greenlee Slug-Busters can be used on mild steel up through 10 gauge (3.5 mm). Application: Punch mild steel, aluminum, fiberglass and plastic. Operates with battery, hydraulic, ratchet or manual drivers.