Durable Materials: The driver bits set made of high quality s2 alloy steel special heat treatment technology, which offers exceptional wear resistance, impact resistance, and hardness, enhancing the strength of bits and life
High Torque Design: Torsion zone to absorb torque peaks to avoid breakage, taking pressure off of the drill tips for increased durability in high torque applications which will not twist and break easily
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
1/4 Inch Hex Shank: 1/4 inch hex shank, fit for electric screwdrivers, hand screwdrivers, impact drivers, electric drills, air drills and so forth. Suitable for woodworking, machinery manufacturing, and automobile maintenance, etc.