Often see the surprised faces of friends and acquaintances when did this with office knife.
Many saw the slot on the back of a lid of a knife, but not many people wondered why she was.
Remove it and put a gap on the knife blade is blunt, as shown in the figure. Take konstrutsiyu the hands so that the blade was drawn to you by the party on which there is no "ticks" blade. CAUTION Bend the blade along the line of fracture toward safe from yourself and others. Usually a piece of the blade remains in the cap.
2. Do this