Norton Clipper Wire Brushes and Wheels provide a pristine and professional performance for cleaning and deburring on various surfaces including steel, ferrous metals and stainless steel This wire wheel is designed with a specialized stainless steel wire that pairs best with aluminum, brass, copper, stainless steel and wood Ideal for heavy jobs with a medium coarse wire diameter, while a wheel design will help clean and refurbish on narrower surfaces Twist Knot wire brushes such as this one are built with straight wire filaments that twist together to create a rigid rope design, ideal for aggressive applications that require higher impact Wheel size is 4 inches and will operate up to 12,500 RPM. Comes as a pack of 1