Strong magnetic motor, the maximum speed can reach 170r/min. With the all metal , the concentricity of the bits is less than 0.2mm when rotating, which can effectively improve the finishing efficiency. Small size, built-in rechargeable lithium battery, long service life and 400+ precision screws can be hit when fully . 48pcs S2 steel precision bits, hardness up to 60HRC, tough and durablem meets the needs of mainstream electronic products and small household appliances disassembly and assembly. This precision screwdriver has two working modes. The manual and electric modes can be freely switched at any time according to maintenance needs. Integrated aluminum alloy shell, anodized aluminum alloy process is antiskid, sweat resistant and not easy to rust. 13 battery safety tests 3 charging protection is 2 LED lights provide enough bright spots. Colour:silver Material:Metal Package Contents: 1 x Electric screw tool 48 x Electric drill bit 1 x box Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.