FC 2-421D 17" Pad Driver Assembly for Factory Cat Tomcat 52, 5100 Scrubbers, 6 Point Drive Plate. A 17" diameter molded plastic brush block with 1/2" short trimmed polypropylene. The short trim poly digs into and holds your floor pad securely to the brush block with the aid of a pad centering device or "pad grabber". This two piece pad grabber is included with the assembly. 17" diameter plastic block with an 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 18-421D for 8 pt.). Designed to hold your 17" or 18" diameter floor pads. Fits Factory Cat Model 52 and Tomcat 5100 floor scrubbers. Three pad drivers are required for models 52 and 5100. Priced Each. Replaces Factory Cat Tomcat 2-421D. Our Part Number FC 2-421D