Features - Those Hex Head Screwdriver Bits are made of S2 alloy steel which is a commonly used material in hardware with high hardness - Materials: S2 alloy steel - 8 sizes a set at an inexpensive price can meet your requirements Those bits fit for electric screwdrivers, hand screwdrivers, electric drills, air drills and so forth - Magnetic bits are firmly fixed on screwdrivers Descriptions: - Those Hex Head Screwdriver Bits are made of S2 alloy steel which is a commonly used material in hardware with high hardness - Magnetic bits are firmly fixed on screwdrivers - 8 sizes a set at an inexpensive price can meet your requirements Specifications: Materials: S2 alloy steel Type of head: hex Type of joint: 6.35mm / 1/4 inch hex Net weight: (approx.) 86g Features: Those bits fit for electric screwdrivers, hand screwdrivers, electric drills, air drills and so forth   Notes: Please allow a bit manual measuring errors Package included: 1 x H1.5 Magnetic Hex Screwdriver Bit 1 x H2  Magnetic Hex Screwdriver Bit 1 x H2.5 Magnetic Hex Screwdriver Bit 1 x H3  Magnetic Hex Screwdriver Bit 1 x H4  Magnetic Hex Screwdriver Bit 1 x H5  Magnetic Hex Screwdriver Bit 1 x H6  Magnetic Hex Screwdriver Bit 1 x H8  Magnetic Hex Screwdriver Bit Package List