... power tool set, consisting of a power pack, rotary micro motor,foot rheost JD800 micromotor electric power tool set, consisting of ... all purpose electric grinder of high torque and a rotary speed of 3000 Up to15,000RPM ,3000 up to 25000rpm is ... pack, rheosat,handpiece cradle apair of collet chuck wrenches ,foot variable speed control zero to max rpm,a coalAvailable 2.35mm/3 ...