The 20" disk style scrub brush is installed and removed without tools to allow ease when switching between different brushes or pads, depending upon the application's needs. The squeegee blades can be rotated or flipped without tools. Nimble enough to clean congested areas with ease, but durably built on a steel frame to last years. Clean a variety of applications including concrete, epoxy, grout, VCT and in hard to reach areas with its small footprint.