Weiler 3/4″ Coated Cup Crimped Wire End Brush features a solid end construction and very flexible brushing action. ideal for more demanding light-duty cleaning applications in corners and hard-to-reach areas. 1/4″ stem diameter for use on die grinder and right angle die grinders. A solid end construction. Very flexible brushing action. Ideal for more demanding light duty cleaning applications in corners and hard-to-reach areas. 2000 rpm maximum speed. .