• Knockout eliminates time-consuming hand sawing and filing when making keyways for push-button switches
• Use as a nibbler to make wider or deeper keyways
• Punches 1/8" or 3/16" keyways for 7/8" or 1-7/32" push-button holes

The Greenlee 720 Keyway Nibbler Punch is a tool for creating keyways in electrical installations. Knockout eliminate the tiring process of hand sawing and filing, this punch allows you to quickly and accurately make keyways for push-button switches. The Greenlee 720 can also be used as a nibbler, enabling you to create wider or deeper keyways as needed. It easily punches 1/8" or 3/16" keyways, compatible with 7/8" or 1-7/32" push-button holes, making it ideal for a variety of applications.