The IS 5100Z series™ of full-sized zero-turn mowers features an impressive complement of comfort, performance and convenience. It features easier service access, more horsepower, improved operator comfort and increased performance, all contributing to lower cost of ownership. We've upgraded our industry-exclusive suspension and Roll Over Protection System (ROPS) as a standard feature. When it comes to commercial lawnmowers, this is truly the ultimate riding and cutting machine. The HydroCut™ series™ is in a class by itself. The single hydrostatic transmission found on the HydroCut makes this mower extremely easy to operate.