Knockout Draw Stud, For Use With Tool Type 1/2 in Conduit Size Greenlee SpeedPunch Knockouts, Greenlee QuickDraw Manual-Hydraulic, 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 3/8 in, Draw Stud Length 3 7/8 in, Finish Carbon Steel, Series Knockout Draw Stud