DWE 4257 KT. Motor with very high copper content for increased performance. With epoxy resin armored winding increases the life of the engine. Special Jetstream cooling air routing protects the motor effectively against abrasive dust particles. Speed selection via knurled wheel for working according to the material. Overload protection prevents a burn out of the engine by turning it off in case of overload operation. Tool-free changing of the application tool by quick-clamping flange. Tool-free protective cover fast adjustment. Specially Insulated Brush Holder will prevent the development of short-circuit bridges. Self-switcing off carbon brushes for higher motor shelf life. Electronic coupling for increased safety of the user. Zero voltage switch prevents accidental start of the machine after a power failure. Constant speed control for constant speed, even under load. Concrete surfaces set including 125 mm dust suction hood, handle and diamond pot washer (DT 3797).This text is machine translated.