Spindle lock for easy tool change. Die-cast aluminum bearing flange for a long service life of the machine. Vario-Constamatic (VC) electronics for working with material-specific speeds that remain almost constant under load. Adjusting wheel for preselection of the speed. Electronic safety shutdown of the motor in case of blocking of the insert tool for safe working. Restart protection prevents unintentional start-up after power interruption. Electronic overload protection for long service life. Precise clamping neck for stationary use. Removable rubber protection cap for comfortable and safe working. Slim design for optimum handling. Precision collet chuck for exact concentricity. Metabo Marathon motor with patented dust protection for long service life.