An electric jack hammer（electric breaker ）is a double-insulated hand-held electric tool powered by a single-phase series motor. It has the characteristics of safety, reliability, high efficiency, and convenient operation. It is widely used in pipeline laying, mechanical installation, water supply and drainage facility construction, For interior decoration, port facility construction and other construction projects, it is suitable for picks and drills or other appropriate accessories, such as chisels, shovel, etc. to crush, flatten, excavate, groove, and cut concrete, masonry structures, and asphalt pavements.