Rental Half day $45.00 Whole day $60.00 Thatch can keep water and air from reaching the soil and, if left untreated, can create an environment that harbors pests and diseases. Dethatching removes those layers of dead grass, roots and debris matted between the soil and the growing grass, keeping the grass greener and healthier while minimizing the chance of disease.An easy-to-operate height adjustment lets you fine-tune from one inch above the ground down to 7/8 of an inch below. A pivoting front axle helps keep three wheels on the ground at all times, preventing hazardous scalping. Four interchangeable reels make customization easy. With the simple loosening of just two nuts, you can switch between a flail-type reel and three fixed-type reels with varying blade thicknesses and spacings.