The new 4815 electric wrench features a high-speed brushless motor, a split type strong magnetic brushless motor, and a Hall free brushless motor. After checking the information, it appears to be a universal brushless motor for the 2016 electric wrench, powered by an 18V lithium battery. The split motor needs to be fixed with a bearing in the housing before it can be used. This motor alone cannot function properly. The general housing is estimated to be compatible with the 2106 universal housing of the model, and specific size parameters need to be understood and compared by oneself. The nominal voltage of is 18V, and the measured supported voltage range is about 16-22V. It has a button speed control forward and reverse switch, supporting forward and reverse and stepless speed control. reverse can switch to self stop mode, and the forward can switch to high and low speed modes., Weight: 0.551155655 Pounds, Manufacturer: NONDK