This product uses a ratchet wheel to connect with the spiral knife bar. When the handle is pressed, the spiral knife bar automatically rotates. Each time it is pressed, the bit rotates 1.2 times. According to the setting of the switching device, the tightening or loosening effect of the screws can be achieved, which is suitable for various occasions. Adjustment switch: three speeds are available for loosening, tightening and fastening. Push Pull Ratchet Screwdriver Set 6 in 1 Press Type Semi-automatic Rotating Spiral Screw Driver Bit Multi Tool Multifunctional Kit Feature: This product uses a ratchet wheel to connect with the spiral knife bar. When the handle is pressed down, the spiral knife bar will automatically rotate. Each time it is pressed, the bit rotates 1.2 times. According to the adjustment of the switch device, the effect of tightening or loosening the screws can be achieved, which is suitable for various occasions. Adjusting switch: three gears are available for loosening, tightening and fixing. Wooden handle: comfortable to hold, convenient and practical, screwdriver heads cannot be stored in. Plastic handle: with storage bin design, it is very convenient for bit storage and access. Specification: Material: alloy steel, PP Heat treatment: HRC45-50 System: Metric Weight : Type A: 144g (Red), Type B: 124g (Brown) Length: Type A: 29*217mm (wood handle), Type B: 34*220mm (plastic handle); Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. 1 x Semi-automatic Rotating Spiral Screwdriver 5 x Replacement Bits