This axle assembly is a genuine MTD part, sold individually. This axle assembly can be used as a replacement part for a lawn mower. The purpose of the axle assembly is to affix the wheels the appliance and to create an adjustable height mechanism for the deck of the appliance.The axle assembly might have to be replaced if it has been damaged or is malfunctioning to the point that it cannot perform its dual function. If any of the components loosen over time or if the axle assembly is punctured, scraped, cracked, or otherwise damaged, the axle assembly should be removed and replaced by this genuine OEM replacement part. It is a simple replacement that will require only basic tools. Remember to always wear gloves when handling, repairing, and operating outdoor equipment. Always unplug the appliance before performing any kind of repair or replacement.This is an OEM part sourced directly from the manufacturer. It is sold individually. This axle assembly is compatible with the following outdoor appliance brands: MTD, Craftsman, troy-Bilt, Yard Machines, Murray, Yard Man, MasterCut, and Huskee.