FC 18-421X .018"/500 Soft Grit Scrub Brush for Factory Cat Tomcat 350D, 52, 5100 Disc Brush Model Scrubbers which require 8 Point Brush Drivers. An HMP Supply special item. Our customers have asked for a softer, longer lasting, general duty light grit scrub brush than the .022" Light Grit offered by Factory Cat. These softer, smaller diameter .018" DuPont Tynex-A Nylon scrub brushes are great for light duty scrubbing of all hard surfaces and some delicate surfaces. These light grit brushes are commonly used on epoxy painted flooring with grit, marble, stone, quarry tile and similar slightly sensitive surfaces. Equivalent to Dyna-Scrub, Mal-Grit Lite. Commonly grey or light green in color. Replaces red or light green floor pads. 17" diameter plastic block (18" scrub path) with an 8-point clutch plate (Please check your model for the proper number of points. We offer a 6 point and 8 point clutch plate. Use FC 2-421N30 for 6 pt.). For a slightly more aggressive grit brush, use FC 18-421PS, .022"/180 Grit. Fits Factory Cat and Tomcat 350D (Disc Model), 52 and Tomcat 5100 disc brush model floor scrubbers (Some of these models also take cylindrical scrub brushes. Please check your model before ordering). Two brushes are required for model 350D, three brushes are required for models 52 and 5100. Priced Each. Not offered by Factory Cat Tomcat. Our Part Number FC 18-421X