VEVOR Hydraulic Knockout Punch Kit, 4 Pieces 1/2", 3/4", 1", 1-1/4" Conduit HoleVEVOR Hydraulic Knockout Punch Kit, 4 Pieces 1 2", 3 4", 1", 1 1 4" Conduit Hole Cutter Set, Metal Sheet Driver Tools, KO Tool Kits For Aluminum, Brass, Stainless Steel, Fiberglass and Plastic 4 Dies & Punches Set Select Suitable Size Slug Splitting Design How to Punch a Hole Guaranteed Quality Workmanship Wide Application Number of Dies: 4,Model: SYK 8T 15T,Material: 40Cr Steel,Conduct Size: 1 2", 3 4", 1", 1 1 4",Thread Stud Specification: M20X1. 5