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