Features: Electric wrench, Mutian type, bare machine, input power 750W, output power 650W, 【Powerful engine】:The most important thing for power tools is to have a powerful generator.powerful 21V engine has a maximum of 600 N.m, and the fastest speed can reach 3200rpm, allowing you to save time and effort during work. 【Variable speed and usage】：The speed of the impact wrench can be controlled by the switch. The more you press the button, the faster the speed will be. When you release the button, the power wrench will immediately stop running. It can be used not only in daily car maintenance, but also in large-scale construction projects, heavy equipment maintenance and product assembly. Lightweight tools designed to fit the users' needs, Soft grip handle for added comfort and total contr.