... load Speed:4900r/min 4) Spare parts100% exchangable to original We are professional power tools factory in Qidong ... ,China. Produce Angle Grinder,Electric Drill,Impact Drill,Rotary Hammer,Demolition Hammer,Orbital Sander,Circular Saw,Chain Saw,Polisher Sander etc ... .Also we produce the Motor(Armature,Sattor,Angle grinder gear,Aluminium ...