1. Product material: aluminum alloy handle + chrome vanadium alloy steel head. 2. Head hardness: up to 55. 3. Rotating tail cap: the tail cap can rotate 360 to make your operation simple. 4. Built in strong magnetic field: the handle head and bit head contain strong magnetic field, so it is easy to pull out and insert, and the head can easily pull up small screws. 5. Equipped with universal soft rod: the lengthening rod can be spliced at will to easily deal with narrow area or deep vacancy maintenance. 6. Product features: built in 56 precision heads and sleeves of different specifications, a total of 12 types, widely used in all mobile phones, tablets, computers, laptops, quartz watches, cameras, glasses, game machines, radios, toys, UAVs and other electronic digital products, to meet the needs of most daily precision maintenance. 7. Package includes: 1 x screw driver handle, 48 x bit head, 8 x sleeve, 1 x universal soft rod, 1 x electric drill connecting rod.