The MTD 918-05078A Spindle Assembly with a 6.3-inch pulley is a replacement component designed for compatible MTD lawn mowers and riding mower deck systems. The spindle assembly supports blade rotation, while the pulley transfers rotational power to help drive the mower blades during operation. This replacement part is suitable for lawn mower maintenance and repair projects. Always ve... https://www.wholetoolbox.com/mtd-918-05078a-spindle-assembly-6-3-pulley/918-05078A.html