Weiler 4″ Circular Flared Crimped Wire End Brush features crimped wire fill which has been “pre-flared” to match the working angle of the brush at operating speed and suited for addressing broad and slightly contoured surfaces. 1/4″ stem diameter for use on die grinder and right angle die grinders. Crimped wire fill which has been pre-flared to match the working angle of the brush at operating speed. Suited for addressing broad and slightly contoured surfaces. . . .