"Clean bushings, ports, tubes, holes, channels, sockets, brake guides, etc.","Twisted wires for increased cleaning action","For use in automotive, agricultural, industrial and MRO industries","Do not exceed 600 RPM","Includes 36 brushes: 12 steel, 12 brass and 12 nylon (8mm-19mm diameter with 1/4\" Hex shank) and 1/4\" locking bit head driver 36 PIECE BRUSH KIT WITH DRIVER BK8001D | Matco Tools