Features: Designed according to ergonomic principles, easy to use. Tail R slot, not easy to fall off, high-frequency quenching, more durable. Strong magnetic head, reduce screw loss, high degrees of occlusion, easy to use. High versatility, a variety of specifications, can be selected according to different specifications,suitable for air screwdriver, electric drill, charging drill, etc . Widely used in home DIY, woodworking, auto parts, professional mechanics, etc. The magnetic hex adapter allows the drill to securely hold the drill bit for faster installation. Long service life and good operation durability. Used in the manufacture of assembly systems and other systems. The screwdriver bits have good strength and high toughness. Suitable for all electric drills, spiral guns, cordless magnetic drive sandblasting, chromium-vanadium steel bits. Specification: Material:Chrome Vanadium Steel Item Type:Socket Set Type and Size(Optional) 3 Pcs Set: Diameter: 8mm / 0.31in 10mm / 0.39in 12mm / 0.47in Length: 65mm / 2.56in 5 Pcs Set: Length: 60mm / 2.36in Diameter: 6mm / 0.24in Package List: 1 Set of Socket 1、Designed according to ergonomic principles, easy to use. 2、Tail R slot, not easy to fall off, high-frequency quenching, more durable. 3、Strong magnetic head, reduce screw loss, high degrees of occlusion, easy to use. 4、High versatility, a variety of specifications, can be selected according to different specifications,suitable for air screwdriver, electric drill, charging drill, etc . 5、Widely used in home DIY, woodworking, auto parts, professional mechanics, etc.