Nylon

4 piece kit fits all drills and impact drivers. 1/4 inch quick change hex molded-in shaft. The Red brush has stiff bristles for heavy duty scrubbing of flooring, concrete, and brick. The Green and Yellow brush have medium stiffness bristles for all purpose scrubbing of Tile and Grout, Bathroom surfaces, and stairs. The white drill brush attachment has soft bristles for cleaning Glass, Leather, or upholstery. Drill NOT included. Drill Powered four piece Scrub Brush Kit Soft Scrub Brush, Medium Scrub Brush in Yellow and Green, Stiff Scrub Brush Save time and effort with our drill attachment power scrubber brush set Our 4 inch diameter drill brush attachment set features a quarter inch quick change shaft Durable rotating Nylon bristled cleaning brushes

4 piece kit fits all drills and impact drivers. The Red brush has stiff bristles for heavy duty scrubbing of flooring, concrete, and brick. Drill NOT included. Drill Powered four piece Scrub Brush Kit.