タイトルまたは説明

1.Shock absorption design at the front part ensures stable work and no break. This design is protected by national patent Dept.
2.NSK bearing, the max power of rotor can reach ***0W. This helps increase work efficiency.
3.Switch handle with Hexagonal head locked can ease the shock  to protect the handle without break.
4.The impacting part is made of special materials,durable, no break
5.Applications: large-scale building,highway, bridge with heavy duty.