WHEELER SCREWDRIVER SET PROFESSIONAL GUNSMITH 43 PCE - SKU: WH-PGSS43 Wheeler Gunsmithing Screwdriver Set Screwdrivers are the most important and most-used gunsmithing tools. Wheeler"s Gunsmithing Screwdriver Sets are the kits that belong on every gunsmithing 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".