FC 11-421D 11" Pad Driver Assembly for Factory Cat Tomcat Floor Scrubbers. Our short trim pad driver has 1/2" uneven poly filaments which "stab" into your floor pad. Assisted by our pad centering device. Designed specifically for holding your floor pad to the floor scrubber. Includes 8 point clutch plate. Some older models require a 6 point clutch plate (if a 6 point plate is needed, please reference this in the Special Instructions box at checkout). Please check your existing brush/pad driver set up before ordering. Commonly listed as a 10" pad driver. Fits Factory Cat and Tomcat branded floor scrubbers including Factory Cat model 21 and Tomcat 2100-D. Most machines require two pad drivers. Priced Each. Replaces Factory Cat Tomcat 11-421D. Our Part Number FC 11-421D