Ideal for cleaning pipes and ducts. Wire brushes clean surfaces in the same manner as sandblasting. Because of using superior quality hardened steel wire rotating at a high rate of speed, the brushes have the ability to separate surface contaminants from base material. Wire brushes will not remove base material or change part dimensions. Unlike non-woven, bonded and coated abrasives, wire brushes will not load when brushing soft materials or when used to remove paint and similar coatings. Ideal for Internal Cleaning of Pipes and Flues.