Weiler Wire End Brush, Hollow End, Round Shank, Steel, Partial Twist Knotted, 1-1/8" Diameter, 0.02" Wire Diameter, 1/4" Shank, 22000 rpm (Pack of 1) Rugged knot-type construction provides aggressive, high-impact action for severe applications Applicable for cleaning and finishing recessed areas of IDs; cleaning and polishing die, mold and tool; rust, paint, scale, slag and rubber/plastic flash removal Also used for Spot facing, deburring, weld, carbon and ID pipe cleaning