Especially suitable for the de-burring and cleaning of pipes, screw threads, sleeves and cylinders. In addition to the thread, internal brushes up to 20 mm are provided with a pin part, making it possible to clamp it in a 6 mm collet. Internal brushes with 3/8 thread are further fitted with a 10 mm pin section. Suitable for use with low revs up to 1,000 min-1.