The 52 in. Recycler Kit, when installed on compatible 42 in. deck Toro zero turn riding mowers, gives it the capability to mulch grass by cutting it multiple times turning it into fine clipping pieces. These are returned under the mower back into the soil to serve as natural fertilizer. When it comes to reliability, Toro delivers replacement parts designed to the exact engineering specifications of our equipment. For peace of mind, insist on Toro genuine parts.