FC 2-421SS 18" .065"/46 Heavy Grit Plus Scrub Brush for Factory Cat Tomcat 52, 5100 Scrubbers, 6-Point Driver Plate. Our most aggressive stripping and heavy duty scrubbing brush. Long lasting .070" diameter DuPont Tynex-A or Hahls Nylon is impregnated with large 36 grit silicon carbide granules. These brushes are designed for stripping jobs and heavy duty scrubbing jobs on most hard surfaces. Equivalent to Super-Grit. Replaces black stripping 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 18-421SS for 8pt.). Fits Factory Cat 52 and Tomcat 5100 floor scrubbers. Three brushes are required for models 52 and 5100. Priced Each. Replaces Factory Cat Tomcat 2-421SS. Our Part Number FC 2-421SS