Genuine Original Equipment Manufacturer (OEM) parts! This mandrel assembly (part number 539112170) is for lawn tractors. Mandrel assembly 539112170 attaches to the mower deck and spins the blades. The assembly 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 Husqvarna, Dixon, & Craftsman.