208 Piece Ultimate Screwdriver Bit Set, High Grade Carbon SteelULTIMATE SET: 208 pieces including Nut Drivers, Security Bits, Torx, Slotted, Phillips, Square, Pozi, Hex, Socket, and other specialty bits in commonly used sizes.. EXCEPTIONAL: Bits are made of high grade carbon steel (50BV30 & 6150 Grade) and sand blasted for optimum strength and longevity. BUILT FOR WORK: Comes in a sturdy, hard shell case with labeled slots to keep bits organized. Includes multiples of the most common sizes so you can keep