Ratchet design: positive and negative adjustment, can quickly mount and dismount positive and negative rotating screws, ideal for fixing screws in confined spaces 200% improvement in efficiency: technology double drive with high torque ratchet, 2 times faster than standard screwdrivers. This design can improve your work efficiency and reduce labor. Comes with 10 standard size 45 hex bits made of C6 steel (6.35mm), high hardness, high torque, wear resistance and durable Comfortable and easy: hex reinforcement, reinforced connecting rod, does not slip easily. With magnet, no falling off, durable. Soft handle, easy to use, labor-saving, and relaxed working Good choice for left-handers: can be switched between right-handed, left-handed and fixed rotation. Fast closing and unclamping, no matter with right hand or left hand