[COMPATIBILITY]--SCITOO Spindle Assembly is compatible for Murray: 20551, 24384, 24385, 492574, 492574MA, 90905, 92574, OREGON: 82-243, PRIME LINE: 7-04229, for Stens: 285-332, SUNBELT: B1SB2925 [FUNCTION OF LAWN MOWER SPINDLE ASSEMBLY]--Lawn mower spindles help your lawn mower pulley system perform efficiently while giving your lawn mower power. A rugged aluminum die cast construction to easily withstand a wide variety of high impact situations. [WHEN SHOULD THE MOWER SPINDLE SHOULD BE REPLACED]-- The spindle assemblies are responsible for turning the mower blades. They are powered by the drive belt and pulleys and are subject to general damage and wear. Bent, damaged, and unbalanced blades can further damage the spindle assemblies. If they are too damaged, they should be replaced. [FEATURES]--Cold forged steel shafts, heavily reinforced housings and extra ribbing for superior spindle assembly strength and a longer life span. Uniquely designed that maximize unit longevity and promote stress free maintenance. Precision-grade bearings for extended operation. [ATTENTION]-- Please be sure to compare carefully with photos and check size part before buying items.Please contact us if you have any question regarding our this product.