Fits three blade decks with 44", 46" and some 50" decks. Was used mostly on 46" decks. Craftsman, Poulan, Husqvarna, Wizard, Yard Pro, and More. Check owners parts list for proper application. Warning!! When installing the shaft it is important to install the spacer (thick washer, not included) in proper position, between the pulley and the top bearing. If spacer is installed above the pulley damage will occur to the shaft and pulley. If you do not have the spacer order part #187690