Greenlee LS50L11B Battery-Powered Knockout Punch Driver Tool Kit Punch holes from any angle with the 360 degree rotating head Punches up to 6" holes in 14 gauge mild steel and 2" holes in 14 gauge stainless steel Slim, compact and light-weight design for reduced fatigue and easy control Automatic retraction prevents damage to punch and die One trigger controls all tool functions, no additional manual work required