1.-It contains three different specifications of bits, slotted screwdrivers, Phillips screwdrivers and hexagonal screwdrivers, a total of 12 pieces, which largely meets your needs.2.-Made of vanadium steel, it has high hardness, wear resistance and rust resistance, so you dont have to worry about deformation or aging.3.-Adjustable design, can be adjusted by turning the head forward and backward, when pointing to "L", the screw will be loosened, when pointing to "R", the screw will be tightened.4.-Mainly used to remove stubborn screws, auto parts, rusty screws and other screws that are extremely difficult to remove.5.-Equipped with a green iron box for storage, which can be taken anywhere, and because of the bright green color, it is more obvious and difficult to lose.