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The Greenlee 71BB is a round standard knockout punch unit with a 7/8 in (22.5 mm) cutting diameter designed for 1/2 in (PG 16) conduit. The unit includes punch, die and draw stud and is intended for punching 10 ga mild steel, aluminum, fiberglass and plastic. It is compatible with battery-powered, hydraulic, ratchet and manual drivers and features alignment markings for accurate hole placement.
Standard round knockout punch unit for clean, accurate 7/8 in conduit holes.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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