We built the ZT3500 zero-turn mower to deliver commercial-grade durability and performance at an affordable price complete with a standard 7-gauge steel frame, Hydro-Gear® ZT-3400 hydrostatic transaxle and a high-back, full-mechanical suspension seat. Convenient maintenance, a great cut and all-day mowing comfort make the ZT3500 the perfect machine for anyone ready to take on the toughest turf.