Motor robust and wear-resistant, slim motor housing for optimum handling, rotating battery pack for working in hard-to-reach places, removable dust filter to protect against penetrating particles, quick tool change without key, non-twisting protective cover, adjustable in seconds without tools, high torque, electronic soft start, light signal to inform about special situations (e.g.B. triggered restart protection), thermal overload protection, restart protection, multifunctional monitoring system to protect the machine and battery pack.