Wheeler's Professional Gunsmith 43 Piece Screwdriver Set is a kit that belongs on every gunsmith's bench. The well thought-out bit selection will put an end to burred, buggered, busted up screw slots on any gun that comes your way. The bits make up the heart of any screwdriver set, and Wheeler's are the finest available. They're made from S2 tool steel and hardened to 56-58 Rockwell "C". Its hollow-ground bits are gently curved as it reaches the tip instead of being straight to protect the fit and finish of the screw. The hollow-ground shape spreads force equally along the sides of the screw slot resulting in no damage. This 43 Piece Screwdriver Set features a very comfortable over molded screwdriver handle to ease all of your work. Never lose a bit with the durable custom box that s ready for the bench or your range kit.