• Brush Research’s mandrel mounted copper center wheel brushes are available in 1.250”- 3.000” diameters. These small diameter wheels come in either carbon steel and stainless steel filament. Ideal for internal pipe cleaning, carbon removal, flash removal, and light rust and scale removal. Constructed on 1/4" diameter shank which eliminates the need for separate adaptors when installing in chucks or collects of portable tools or drill presses. Designed to operate at high speeds (MSFS 25,000). Proudly made in the USA.