The Simplicity 2172256SM Lawn Mower Ball Bearing helps reduce friction between moving components for smooth and efficient mower operation. Designed as a replacement ball bearing, it fits compatible Simplicity lawn mowers and outdoor power equipment to support rotating shafts and assemblies. It works by allowing components to rotate with minimal resistance while maintaining proper alig... https://www.wholetoolbox.com/simplicity-2172256sm-lawn-mower-ball-bearing