This is a battery-powered electric screwdriver. It only has one Phillips head, and the other interchangeable bits have been lost. Operation has been confirmed. It can easily tighten and loosen screws. Since it's battery-powered, it's very useful anywhere. It's lightweight, compact, and easy to handle, with a simple switch to change between tightening and loosening. It's very convenient, as it prevents hand pain from screwing. Manufacturer: Takagi Model: DDR-140CL Size: 110 x 155 x 45 (mm) Batteries used: AA x 4 Batteries are not included.