Genuine Original Equipment Manufacturer (OEM) parts! This mulch kit (part number 33746) is for lawn tractors. Mulch kit 33746 changes the tractor from bagging mode to mulching mode, to finely shred the grass clippings and drop them to the ground. Mulching reduces the need for extra nitrogen fertilizer by returning nutrients to the soil. The kit may include multiple parts; refer to your parts diagram for a complete list of parts included. Wear work gloves to protect your hands when installing this part. For Craftsman.