Myswitchblade.com Carry a Wide Selection Of Real Handmade Italian Switchblades as well as Many others from across the World. Switchblades or Switchblade Knives (AKA an Automatic Knife) is a knife with a blade that can be deployed by depressing a button, switch, or hidden mechanism. Switchblade knives vary in design; some deploy the blade in a linear fashion from the handle.