Weiler 1/2″ Polyflex Encapsulated Crimped Wire End Brush features a burgundy 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. Burgundy 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. . . .