BG Card Slot PunchBG Card Slot Punch The BG card slot punch is a detachable straight blade used for cutting leather and other materials. Easily swap out different size blades with the included Allen key. As the name implies, it is a useful tool for cutting long 'credit card slots' and specific long length straight cuts that can be otherwise difficult to control when cutting with a knife. We use steel 6CR13, which is a corrosion resistant and hardened steel, great for