The Simplicity 5100993SM Lawn Mower Spindle Assembly supports smooth blade rotation and reliable cutting deck operation on compatible lawn mower equipment. Designed as a replacement spindle assembly, it provides the mounting and rotating support needed for the mower blade to operate as intended. A properly functioning spindle helps maintain consistent blade movement and contributes to... https://www.wholetoolbox.com/simplicity-5100993sm-lawn-mower-spindle-assembly/5100993SM.html