The Quest S-Series residential zero-turn lawn mower truly goes the extra mile as a commercial-grade zero-turn rider for homeowners. The S-Series provides all the amenities of the E-Series plus even more commercial-grade features. Like the ultra-smooth serviceable ZT2800 hydro drive system. Or the Series 2 fabricated deck. It’s heavy-duty 10-gauge steel and welded wear strip gives you a great cutting machine that will last.