Drive square size (inch): 3/8, 1/2 Impact number: 3 (ipm) Drive shaft / chuck: 3 Tightening capacity _ standard bolt: 2 Tightening ability _ high strength bolt: 4 Power type: rechargeable – lithium battery technology Specifications: 12V 18V 28V Power supply voltage: 220V Rated input power: 500W Rated voltage range: AC single phase and DC 50V and below. European plug / beautiful plug / British plug / Australian plug. Complete specifications and a lot of colors. Scope of application: stage truss.