Replaces: AYP/ROPER/SEARS 137646 PRIME LINE 7-05275 STENS 285-468 STENS 285464 SUNBELT B1RS21 Application: Fits 36", 38" and 42" Sears, AYP mowers with ventilated decks using 5 point center hole blades. 3/4" OD shaft, 7" long.