Saker Woodworking Scriber Marking Line Ruler,Aluminum Alloy T-Square

EASY REMOVAL: Remove front and rear knockouts from electrical panels embedded in drywall without cutting holes in the drywall | VERSATILE USE: For use on electrical, security, alarm and datacom panels | EASY-TO-USE: Simply push on the knockout using the tool to loosen and remove it | CAUTION: Do not use this tool near live circuits