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The GREENLEE 7706SB is an 11-piece hydraulic punch driver kit designed for cutting clean, round holes in sheet metal and electrical enclosures. The kit punches holes from 1/2 inch to 2 inches in diameter through mild steel up to 10 gauge. It uses hydraulic operation to drive Slug-Buster punches and dies, reducing hand strain and cycle time compared to manual drivers. The included Quick Draw Flex Driver and draw studs give electricians the flexibility to work in tight or awkward panel locations. This kit is suited for production conduit work, panel fabrication, and field service where repeated knockout punching is required.
The 7706SB is used primarily in commercial and industrial electrical work where electricians need to punch multiple knockouts in distribution panels, junction boxes, switchgear enclosures, and metal enclosures. Hydraulic operation makes it practical for high-volume jobs where manual knock-out sets would slow production. The kit ships with a case for organized storage and transport on the job site, keeping all 11 components together between uses.
Designed for use with Greenlee Slug-Buster punch and die sets rated for round knockout applications in mild steel enclosures and panels up to 10 gauge.
Licensed electricians typically install and operate hydraulic punch driver kits in accordance with NEC guidelines for enclosure and conduit work. Before punching, de-energize all panels and enclosures completely and verify with a voltage tester. Use the correct draw stud size for the selected punch and die pairing, and ensure the punch and die are properly aligned before applying hydraulic pressure. Inspect punches and dies for wear or cracking before each use to prevent tool failure during the punching cycle.
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