Magnetic Bit Set, Tamperproof, TORX, Hex, Spanner, TORQ, Triwing Screwdriver Bits, 32-Piece Klein Tools 32525 Durable PVC gray block allows for easy storage of tamperproof bits Block slides over most screwdriver shafts for easy bit access and storage Industrial strength, heat-treated steel bits for long-lasting use Includes TORX, Metric Hex, Fractional Hex, Spanner, Tri-Wing, TORQ-SET bits and Square to Hex driver adaptor Assembled in USA of US and imported components