HTC 500 is an excellent choice if you are looking for an effective concrete polisher with a very high capacity for its size but it is also a powerful multi machine. The HTC 500 is a three-phase frequency controlled machine with infinitely variable speed, providing increased capacity. The motor is extra tolerant to voltage drop which allows it to run more smoothly. HTC Superfloor™ - Approved Equipment The machine can be used for coarse grinding, preparation, grinding, and maintenance as well as HTC Superfloor™ A powerful multi machine Ergonomically designed High capacity for its size Equipped with three extra weights for varied grinding pressure Very popular concrete polisher among tool hire firms