There was a time when scrubbing floors required plenty of water, soap, and a strong back; the only way to really scrub a floor effectively was to get down on hands and knees and slowly work across the entire floor. Fortunately, the floor scrubber, also referred to as a mop, was invented and took a lot of the labor out of cleaning the floors. As a tool that is used daily in all sorts of public buildings, a mop is a great way to take care of an essential job in a fraction of the time it would take to do the work on hands and knees. Some examples of different types of floor scrubbers include automatic floor scrubbers, floor buffers, and floor polishers; these tools are made of a variety of materials such as brushes and sponge pads, and are typically used with a liquid floor-cleaning agent. Source From : www.yhroadsweeper.com