Dual purpose electric hammer electric low speed or high speed.
It is said that the pursuit of fast drilling speed, the design idea of manufacturers are also different, some single hammer force, low speed, some single hammer force is small, high speed, more vigorously with fast speed, accurate measurement is the result of. I estimate that the same drilling speed and a single hammering force will result in a decrease in comfort.
Low speed, powerful, high speed, easy to heat, I have been using low speed
