Weiler 1-1/8 in Knot Wire End Brush features a hollow end, heavy duty brushing action with some flexibility for more demanding cleaning and deburring applications in recessed areas on steel, armored steel, cast iron, ductile iron and tool steel parts. 1/4 in stem dia for use on CNC/milling/automatic machine, die grinder, drill, drill press, right angle die grinder and straight grinder. This product is vending machine ready.