The Carbon Brush is fitted in a brush holder which is designed to hold it in the correct. position and allow the brush to run on the surface of the commutator or slip ring (collector) to transfer that currrent at optimum performance. Brush holders are pieces that provide safety and stability to carbon brushes. The brushes for clutches are elements whose purpose is to make the necessary pressure on the collectors or slip rings, and that in this way the contact for the passage of electricity can be made.