With Smart Power® technology, high engine torque and patented, HybridDriveTM cutting deck system, the Groundsmaster 4000-D and 4010-D deliver power where you need it most – to cut grass, no matter how tough the conditions. With their excellent trimming capability, you’ll maneuver around obstacles with ease. Both mowers can mow a 0” uncut circle, allowing you to mow back and forth patterns without leaving any uncut grass. The patented, parallel hydraulic traction system maintains consistent hydraulic flow between the front and rear wheels to assure full time 4-wheel drive. This allows you to mow with confidence, even on hills and wet grass.