Material:‎Alloy Steel Length:3 Inch(75mm) Shank:1/4 Inch Hex Shank Number Of Pieces:12pcs 【Multi-size Bits】 Include 4 Slotted screwdriver bits and 8 Phillips screwdriver bits: SL3, SL4, SL5, SL6, PH1*3.0, PH1*4.0, PH1*4.5, PH2*4.0, PH2*4.5, PH2*5.0, PH2*6.0, PH3*6.35 【Premium Material】 Made of high quality S2 steel, high hardness, wear resistance and impact resistance, the surface adopts electroplating treatment, durable for long time service. 【Strong Magnetic】 Magnetizable bit head screwdriver bits can be easily keep screws stuck to them,can improve your work efficiency. 【High Precision】 The precision is strictly controlled in production process, perfectly fits the screws, not easy to slip and collapse, the bits are straight and concentric, effectively reducing the bit swinging. 【Wide Application】 These bits are compatible with electric screwdrivers, manual screwdrivers, T-handle 1/4" driver screwdrivers, corded drills, cordless drills, impact drivers and more. Usually used for mechanical equipment, automobiles, motorcycles, bicycles, furniture, toys, electronic equipment, household appliances, etc. Package: 12PCS Slotted Phillips Screwdriver Bit Set