FC 15-421S / 29-421S 15" .050" Super Abrasive Disc Scrub Brush for Factory Cat Pilot 28, Models 29, 29SS, 290, GTX 30, Magnum 30", 250-15, Tomcat 3000, XR45 Disc Brush Scrubbers which require 15" disc scrub brushes. Our second most aggressive grit filament. Heavy duty .050", 80 Grit scrub brushes are designed for heavy duty scrubbing or stripping jobs. These are commonly used on unsealed concrete flooring with heavy debris. Equivalent to Tough-Grit. Replaces brown or black floor pads. Includes 8-Point clutch plate with spring clip (older model 29's took a six point plate, 7-421S. If these 6pt. brushes are require add this item to your cart and reference 7-421S6 in the Special Instructions box at checkout). Please check your existing brush set up before ordering. 14" diameter block with a 15" scrub path. Commonly listed as a 15" Brush . Most machines require two or three brushes, priced each. These are commonly bundled to reduce shipping costs. Fits Factory Cat Pilot 28, Models 29, 29SS, 290, Magnum 30, GTX 30, 250-15, Tomcat 3000, XR45 and other disc brush models. Many of these scrubbers are offered in a cylindrical brush model. Please check your machine parts manual before ordering. Priced Each. Replaces Factory Cat Tomcat 15-421S, 29-421S. Our Part Number FC 15-421S