All of MIBRO industrial wire brushes are produced on fully-automatic equipment, ensuring consistent wire amounts and consistent wire formation (crimped, knotted and twisted). The 0.02 in. guage industrial brush wire is made from tough, durable 65 Manganese (Mn) and they feature heavy-duty backing plates and matched spindle nuts for stability and reduced vibration. All industrial brushes are precision balanced, ensuring vibration-free action. Each brush has a 5/8 in. to 11 in. arbor (5/8 in. Arbor Hole Diameter with 11 UNC Thread Pitch).