FC 2-421S 18" .050"/80 Nylo-Grit Scrub Brush for Factory Cat Tomcat 52, 5100 Scrubbers, 6-Point Drive Plate. Our second most aggressive stripping and heavy duty scrubbing brush. Long lasting .050" diameter DuPont Tynex-A or Hahls Nylon is impregnated with large 80 grit silicon carbide granules. These brushes are designed for stripping jobs and heavy duty scrubbing jobs on most hard surfaces. Equivalent to Tough-Grit. Commonly black in color. Replaces brown or black floor pads. 17" diameter plastic block (18" scrub path) with a 6-point clutch plate (Please check your model for the proper number of points. We offer a 6 point and 8 point clutch plate - Use 18-421S for 8pt.). We also offer a more aggressive brush for heavier dirt and debris (use FC 2-421SS, Super-Grit Equivalent). Fits Factory Cat 52 and Tomcat 5100 floor scrubbers. Three brushes are required for models 52 and 5100. Priced Each. Replaces Factory Cat Tomcat 2-421S. Our Part Number FC 2-421S