FC 25-421S 12" .050"/80 Black Grit Disc Scrub Brush for Factory Cat / Tomcat (6pt. Plate). Long lasting .050" Tynex-A or Hahls Nylon filament impregnated with 80 grit silicon carbide granules. Great for heavy duty industrial cleaning jobs on older unsealed flooring or for stipping jobs. Equivalent to Tough Grit. We also offer a slightly heavier grit brush (use our FC 25-421SS, .065" Grit). Includes older style 6 point clutch plate commonly used on non-converted models with serial numbers BELOW 50000. Some newer models require a 8 point clutch plate (if an 8 point plate is needed, please reference this in the Special Instructions box at checkout). Fits Factory Cat and Tomcat branded floor scrubbers including Factory Cat GTX and Magnum Series models with serial numbers BELOW 5000. Please check your clutch plate set-up before ordering. Priced Each. Replaces Factory Cat 25-421S. Our Part Number FC 25421S