Perfect for beginners. Electric and Manual Use: A popular item that greatly enhances the work of DIY and furniture assembly. You can tighten or loosen the screws with a push of a button. Women, seniors and children can use it without any problem. Work efficiently It is also possible to work manually. Depending on the size of each part and screw, there are appropriate tightening torque. You can tighten it with appropriate torque by putting it into a certain degree of electricity