The MTD 918-0624B Lawn Mower Spindle & Pulley Assembly supports blade rotation by transferring power from the mower deck drive belt to the cutting blade on compatible lawn mowers. The spindle provides the mounting point for the blade, while the pulley connects to the belt system to enable rotation during operation. Designed for compatible MTD equipment, this assembly can be used as a ... https://www.wholetoolbox.com/mtd-918-0624b-lawn-mower-spindle-pulley-assembly/918-0624B.html