A 7-piece bit set; especially suitable for the area of sanitary, heating, and air conditioning technology. A manual bit holder with a 300 mm long rod, and a very thin and lockable bit holder that allows access to hard-to-reach places. Thanks to the especially thin construction, it is also possible to work on screws that are in very tight assembly situations. The multicomponent Kraftform handle allows high working speeds and great ergonomics during screw connections. The chamber integrated into the handle serves to store the bits. 6 hard and resistant bits, 25 mm long (Phillips cross slot, TORX® and internal hexagon). In this way, the tool set replaces a 6-piece screwdriver set and thus reduces the necessary equipment to a minimum. Thanks to the hexagon it has, the anti-roll system prevents the tool from rolling during work.