The Osborn WRB42 is a high-quality genuine round steel brush designed for demanding industrial applications such as cleaning, deburring, and surface preparation. This durable brush features a 50mm (2-inch) diameter with robust 0.35mm (.014-inch) steel wire fill, ensuring efficient material removal and a consistent finish. It is equipped with a 12.7mm (1/2-inch) arbor hole for secure mounting on various power tools and has a trim length of 20mm (3/4-inch). With a maximum RPM of 20,000, it offers reliable performance for professional use.