Weiler 3/4" Knot Wire End Brush features a hollow end and heavy-duty brushing action with some flexibility for more demanding cleaning and deburring applications in recessed areas. 1/4" stem diameter for use on die grinder and right angle die grinders. This product is clamshell packed for retail. Engineered and manufactured to maximize performance and minimize operating costs in the most demanding surface conditioning applications. The use of superior construction, the highest quality materials and the most stringent manufacturing processes deliver the lowest cost-of-use and most consistent performance in heavy production environments.