ITEM NAME:7 PCS Electric Square Screwdriver Bit Set S2 + Surface Blasting Hex Handle H7P7 7 PCS Electric Square Screwdriver Bit Set S2 + Surface Blasting Hex Handle H7P7 1.The screwdriver bits are made of S2 steel with heat treatment, HRC52-55, good toughness and wear resistance 2.Exquisite workmanship, each edge can accurately lock the screw without damaging the screw or the screwdriver head 3.With 1/4 inch hex shaft, they are widely used on electric screwdrivers, hand screwdrivers, cordless drills, etc 4.The screwdriver bits are 150mm /6 inch long, suit for poket hole jig woodworking. 5.Fit for electric screwdrivers, hand screwdrivers, electric drills, air drills and so forth etc. Description: Type: SQ1, SQ2, SQ2.5, SQ2.74, SQ3, SQ4, SQ5 Colour:Silver Material:Chrome vanadium alloy steel Size:Length: 150mm (Approx.) Hexagonal Handle 1/4 inch side to side diameter 6.35 mm Package Contents: 7 * Screwdriver Bits