The modular principle underlying our one-way system of trapezoidal toothed roller brushes provides for fast, low cost changes of brushes. They can be installed and similarly removed by a simple hand operation. The teeth lock securely (and in a non-twist manner); as a result, a gap-free bristle surface is assured. Precise true running is guaranteed at all times. The ST system consists of brush segments which are mounted to the brush core with two locking collars. Due to the special modular principle on which they are based, worn individual segments on a roller brush can be replaced.