Specifications‎:‎Those hexagon screwdriver bits are made of S2 alloy steel which is a commonly used material in hardware with high hardness‎.‎Those bits fit for electric screwdrivers‎,‎ hand screwdrivers‎,‎ electric drills‎,‎ air drills and so forth‎.‎6pcs a set at an inexpensive price can meet your requirements‎.‎Magnetic bits can be firmly fixed on screwdrivers‎.‎Type‎:‎ Hexagon Screwdriver BitQuantity‎:‎ 6 Pcs Materials‎:‎ S2 Alloy SteelType of Head‎:‎ HexagonType of Shank‎:‎ HexDia‎.‎ of Shank‎:‎ 6.35mm/1/4 inchLength of Screwdriver‎:‎ 100mm/3.94‎"‎ ‎(‎Approx‎.‎‎)‎Size of Bit‎:‎ H2.5‎,‎ H3‎,‎ H4‎,‎ H5‎,‎ H6‎,‎ H8Usage‎:‎ For 1/4‎"‎ Pneumatic ScrewdriversNote‎:‎Due to the light and screen setting difference‎,‎ the item‎'‎s color may be slightly different from the pictures‎.‎Please allow slight dimension difference due to different manual measurement‎.‎Package Includes‎:‎1 x 100mm*2.5mm Hexagon Screwdriver Bit1 x 100mm*3mm Hexagon Screwdriver Bit1 x 100mm*4mm Hexagon Screwdriver Bit1 x 100mm*5mm Hexagon Screwdriver Bit1 x 100mm*6mm Hexagon Screwdriver Bit1 x 100mm*8mm Hexagon Screwdriver Bit