MALCO Knockout Hole Punches

Suitable for making rivet or screw fastener holes along the edges of metal ductwork and vinyl window extrusions or hog ring holes for attaching signs or bumpers to chain link fences or equipment cages. Supplied with a pre-installed 1/8 inch (3.2 mm) punch and die, as well as a 3/16 inch (4.8 mm) punch and die assembly