Greenlee LS100L11SBSP Battery Powered Punch Driver with 1/2 - 2-Inch Mild Steel Speed Punch Knockout Kit Powerful 11 ton punching force, up to 2X faster cycle time Punches up to 6" holes Versatile 360 degree rotating head punches at any angle Ergonomic lightweight design, 5.8 pounds Auto-stop technology prevents damage to driver and knockouts