The Craftsman 687-02220 Lawn Mower Blade Adapter provides a reliable connection between the mower’s engine crankshaft and cutting blade, ensuring smooth and efficient blade operation. Designed for durability and precise fit, this adapter is used to maintain optimal mower performance by securely holding the blade in place during use. It works by attaching directly to the mower’s spindl... https://www.wholetoolbox.com/craftsman-687-02220-lawn-mower-blade-adapter