Is the Alltrade Squeeze Knife the world’s fastest quick-change utility knife? We think so, and, what's more, we've seen proof. Independent test results prove the patented Squeeze Knife cuts blade change time to three seconds or less, faster than the other leading brands of quick-change knives. In fact, it takes just three easy steps to swap out a dull or broken blade for a shiny new one. So you can get back to work that much faster. The Squeeze Knife comes complete with six heavy-duty utility knife blades, and when those run out you can use any brand of utility knife blades (thicker heavy-duty style blades are recommended).