4pcs/Set Screwdriver Bits Screwdriver U Fork Magnetic Groove Screw Driver CR-V Multi Function Tool Kit Hand Style: U1.7+U2.0+U2.3+U2.6 a total of four pieces Size information: the total length of each piece is 160mm, the length of the handle is 77mm and the handle length is 85mm (due to manual measurement, there is 1-2mm error in the size). The style design agree with the ergonomic rod principle, easy to operate, not fatigue easily, it can solve stubborn screws on the air filter, high-end patch card or etc. The handle is made of PP, double plastic anti-slip design, very comfortable to use Designed according to human factors engineering, it achievemaximum torque screwdriver handle is specially designed according to human factors engineering and is comfortable and convenient to use The hand tool screwdriver professional hand is made of chrome vanadium steel, stronger torsion in use