This adjustment lever knob is a genuine MTD part, sold individually. This adjustment lever knob can be used as a replacement part for a lawnmower. This adjustment lever knob is to adjust the operating height of the lawnmower wheel and the deck.The adjustment lever knob should be replaced if it can no longer customize the height of the lawnmower wheel and the deck or if the height of these components cannot be maintained during the standard operation of the appliance. If the knob suffers damage rendering it beyond functionality or if general wear and tear from long-term usage has left the knob non-reactive to operation, the component should be removed and replaced with this genuine OEM replacement part. Remember to wear work gloves as a safety precaution while repairing or replacing parts within an outdoor appliance. This is an OEM part sourced directly from the manufacturer. It is sold individually. This Adjustment lever knob is compatible with the following outdoor appliance brands: MTD, Troy-Bilt, Murray, Yard Machines, Huskee, Yard Man, and MasterCut.