The Protech Magic is a scale release automatic knife designed by Mike "Whiskers" Allen.  Very Covert Automatic Mechanism with No Push button.  The Magic is a Scale Release.  The handles pivot at the back to fire and unlock the 3.5" blade.  One must hold the knife in the right hand (sorry left handers).  The top handle scale must slide forward (away from your palm), and the bottom must slide in toward your palm.  Wrap your middle finger around the bottom scale and pocket clip for a better grip on the knife.  All it takes is the right squeeze of the back end of the handles scales and ... MAGIC, the knife opens with fantastic automatic action.  The same action or squeeze of the handle releases the blade from the locked open position.