The Murray 1727872ASM Lawn Mower Spindle & Cup Assembly-RH helps support proper blade rotation and cutting performance on compatible lawn mower decks. This right-hand spindle assembly provides a mounting point for the mower blade and helps maintain stable blade movement during operation. A properly fitted assembly supports smooth rotation and consistent cutting. Replacing a worn or da... https://www.wholetoolbox.com/murray-1727872asm-lawn-mower-spindle-cup-assembly-rh/1727872ASM.html