Weiler 1-3/4″ Polyflex Encapsulated Circular Flared Crimped Wire End Brush features a heat-stabilized black elastomer that gradually wears exposing consistent short trim for maximum aggression and long life. Ideal for applications on flat surfaces that require maximum aggression but no flexibility in the brushing action. 1/4″ stem for use on die grinder and right angle air die grinder. Heat stabilized black elastomer gradually wears exposing consistent short trim for maximum aggression and long-life. Ideal for applications on flat surfaces that require maximum aggression but no flexibility in the brushing action. For use with die grinder and right angle air die grinder power tools. Black elastomer. .