Standard Round Knockout Punch Unit 2-1/8" (54.0 mm). Round standard metal punch units are complete units consisting of punch, die and draw stud. Use with battery-powered, hydraulic, ratchet or manual drivers. Properly assembled through pilot holes, they will make clean, fast and accurate holes.
Make and Model
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10 ga Mild Steel
Punch Mild Steel, Aluminum, Fiberglass and Plastic