Knockout Draw Stud, For Use With Tool Type Legacy 3/4 in to 1-1/4 in Conduit Size Slug-Buster or Standard Round Knockouts, Ratchet (1 in), Knockout Punch Component Included Draw Stud, Material Application Aluminum, Brass, Copper, Fiberglass, Mild Steel, Plastic, Maximum Sheet Metal Capacity-Steel 10 ga, Punch Shape Round, Number of Pieces 1, Includes Draw Stud Yes, Draw Stud Diameter 3/4 in, Draw Stud Length 3 1/4 in, Finish Steel, Series Knockout Draw Stud