Product Code 562194 from Battenfeld: The indispensable tool for all gunsmithing work is the screwdriver. Every gunsmith's workbench ought to have Wheeler's Deluxe Gunsmithing Screwdriver Set. The set boasts an intelligently curated selection of bits that will effectively prevent the ruining of screw slots on any firearm you handle. Crafted from durable S2 tool steel, each piece is hardened to a resilience of 56-58 Rockwell.