AMZCNC Manual Knockout Punch Kit, Heavy Duty Metal Sheet Knock Out Box Hole Cutter Conduit Punch Driver Die Set ((Conduit Hole Size) 1" Knockout Punch)

Punch units are complete units consisting of the 1" conduit punch and draw stud makes a 1.362" sized hole., Knockout punch can be used with ratchet, wrench, or electric driver., smooth operation leaves the round hole with clean edges and a uniform size. Manual punch works great in tight areas., Sheet Metal Knockout Punch Kit, perfect for mild steel under 10 gauge (3.5mm), such as sheet steel, copper, aluminum, brass, fiberglass, some plastics, electrical pipe, quazite, conduit (NOT FOR Stainless Steel, Wood, Drywall), Economic Knockout Punch Driver Set, complete conduit punch set include 1 dies, 1 hole punches, 1 bearing driving bolts