Check the listing for details. TEMCo TH0394 - 1 1/4" Conduit Hole Size Knockout Punch Unit & Manual Draw Stud. Condition: Seller refurbished. Listed at 34.99 USD. Specifications: Punch units are complete units consisting of the 1¼" conduit punch and draw stud makes a 1.70" sized hole. Knockout punch can be used with ratchet, wrench, or electric driver. Capacity: Mild steel plate through 10 gauge (3.5mm) Works to punch Mild steel, Brass, Copper, Aluminum (soft alloys only), Fiberglass and plastic.Slug splitting design on punches allows for easier slug removal – the smooth operation leaves the round hole with clean edges and a uniform size. Manual punch works great in tight areas. Punch dies feature laser engraved alignment marks for easy and precise positioning.Manual punch works for use in tight areas.Die set is compatible with THA001 draw stud allowing for use in TEMCo hydraulic drivers TH0004 and TH0037. Also compatible with GREENLEE and other domestic punch tooling 3/4"-16 threads.