Toro Groundsmaster® (30605) 4000-DDescription The Groundsmaster 4000 D delivers power where you need it most to cut grass, no matter how challenging the conditions. With Smart Power technology, high engine torque and patented, efficient deck drive systems, this mower is designed for productivity. Excellent trimming capability to manoeuvre around obstacles with ease, mow a 0 uncut circle, for back and forth patterns leaving no uncut grass. Patented, parallel hydraulic traction system