The 4 and 5-inch brushes are also great for larger sections of flooring, carpeting, and boat covers•Do you need to get into tight spaces or hard-to-reach areas? Drillbrush was established in 2007, we have been designing and innovating brushes based on feedback and demand from our valued customers. Always look for the ''Drillbrush Power Scrubber'' logo to insure you are buying an authentic Drillbrush from the leader in drill powered cleaning brushes.•Do you want to go faster and save fuel at the same time?. Included in the kit is a 2-inch diameter round drill brush attachment for all of those hard to reach spots like around cleats, sidelights, stern lights, masthead lights, or narrow areas of carpeting•All of the brushes in the kit feature a quarter inch quick change shaft.