The TEMCo Hydraulic Knockout Punch has a powerful 9 US TRUE TON punching capacity and produces perfect, uniform holes every time. Its compact design is especially designed for field use on construction sites and maintenance jobs. Quick, effortless and simple to operate. Punches more than 10 times faster than wrench types. Includes Un-Breakable Polymer Tough Case to carry complete set. Also punches Aluminum (soft alloys only, not for use with 7075 or other super alloys), Fiberglass, Plastic, and more. 1/8 inch (11 ga) Steel Punching Capacity, 1/16 inch Stainless Steel. Punches are in metric sizes.