Improved efficiency through new motor architecture and intake of cooling air without an additional fan wheel. Restart protection features a safety switch to prevent unintentional start-up after a power failure. The spindle lock is optimally positioned for convenience. The motor has a very high copper content for enhanced performance. A special flange nut allows for easy and safe disc replacement. The very flat gear housing enables trouble-free use in confined spaces. Self-shutting carbon brushes extend the motor's life. The special "Jetstream" cooling air duct filters abrasive dust particles from the air, effectively protecting the motor and increasing the unit's service life. Toolless quick adjustment of the protective hood allows for versatile use. This compact one-hand angle grinder has a very small housing diameter. Electronic soft start prevents jerky starting of the machine. Epoxy resin armored winding increases the motor's lifetime.