About the Greenlee 720 Nibbler Keyway Punch
The Greenlee 720 Nibbler Keyway Punch is part of Greenlee's premium collection of tools and accessories. This keyway nibbler punch is designed to eliminate time-consuming hand sawing and filing when making keyways for push-button switches. It punches 1/8" or 3/16" keyways for 7/8" or 1-7/32" push-button holes.