The Toro 139-2357 Spindle Assembly supports smooth blade rotation for consistent and effective lawn mower cutting performance. This replacement spindle assembly connects the mower blade to the deck drive system and allows the blade to rotate as power is transferred through the spindle. Proper spindle operation helps maintain stable blade movement and dependable cutting results. Replac... https://www.wholetoolbox.com/toro-139-2357-spindle-assembly/139-2357.html