Application : For punching conduit sized holes in stainless steel, mild steel, aluminum, fiberglass, and plastic. Capacity Stainless Steel : Max: 10 gauge (3.0 mm). Driver : Use with Greenlee 746 Hydraulic Ram & 767 Pump. Material : Carbon Steel, Black Oxide Coated Operation : Must be used with other SPEED PUNCH&#174 System components. Size : 3/4” x 5.79” Sub Brand : SPEED PUNCH&#174 Type : Knockout Punches Weight : 0.80 lbs. (0.36 kg)