The Switchback folding Utility Knife features a unique, revolutionary, patented design to combine the best of a lock-back knife and a switchblade. The push button flips out the blade with guard engaged preventing risk of injury. Quickly retract the guard with the integrated slider to use. Pressing the button again will automatically extend the guard to cover the blade. Only after the guard is engaged can the user fold the knife closed, without risking injury during folding process. It cannot open or close without the guard engaged. This knife is designed specifically for safety with the integrated blade guard, you will not lose the guard like with other utility knives in the market. Includes 2-notch blade.