Designed for high speed operation on pneumatic or electric scaling and sanding machines. These brushes remove rust and scale from metal, clean tanks and boat hulls, take off old paint, and clean castings and structural metal. Threaded nut type and welded shaft types are available. When ordering, please specify the type of fitting required on the cup brush and the inner diameter of the bolt fitting. – Caution – Whenever ordering wire brushes, be certain that they will not be used on machines with speeds higher than the maximum safety speed shown for the brush.