Instructions for use: The head is aligned with the screw and directly hits the rear part of the impact batch with a hammer. The front batch head will automatically rotate. The question section can adjust the forward and reverse rotations, and the upper and lower screws can be used. Features: Heavy duty material: The screwdriver are made from steel, which is heavy duty, impact resistant, wear resistant and durable. All the tools has high hardness. Use: You can apply to loosen OR tightening fasteners with this must-own tool. Comfortable grip: Non-slip grip handle, it is comfortable to hold and operate. Good performance: Impact force helps loosen rusted or frozened screws without damaging. Portable: Easy to carry and use, all the tools are stored with a carry case. Condition:Brand New Color: silver Material: steel Product Name:Impact Screwdriver Set 12pcs: 2 x 8x70mm slotted bit: SL9+SL11 2 x 8X35mm slotted bit: SL9+SL11 2 x 8x70mm crossed bit: PH3+PH3 2 x 8 x35mm crossed bit: PH2+PH2 2 x S2 screw remover 3 +4 1 x impact screwdriver 1 x adapter Package Contents: 1 x screwdriver bit set Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.