The CAST 20 floor machine has a commercial-grade design with all-metal construction in the base, handle, tubes and trigger assembly. Easily swap out pads or brushes to rejuvenate your hard surface flooring. Pad driver sold separately. Designed for user comfort and safety. Floor Machines Type: Roto-Scrubber; Handle Type: Quick-Connect T-Grip; Brush Diameter: 20″; Power Capacity: 1.5 hp.