The spindle assembly kit is a vital component of the lawn mower's cutting deck which enables the blades to work smoothly for an even cut. If your mower blades produce weird grinding noises, have a hard time spinning or spin unevenly then you may have a problem with your spindle assembly. This spindle has a length of 6 1/3" and has a 6 point star shaped blade mound. The kit includes mandrel housings, mandrel shafts, 8 mounting bolts, pulley lock nuts and grease zerks for a complete and superior performance. This spindle has 5 3/8 outside diameter, no threads in housing, use self-tapping screws. Great for: 50" Deck Lawn Mowers Cub Cadet i1050, LT, SLT & RZT Mowers MTD i1050, LT, SLT & RZT Mowers Replacement part number: Cub Cadet: 918-04126A, 618-04126A, 918-04126, 618-04126, 918-04126B, 918-04125, 918-04125B MTD: 618-04126, 618-04126A, 918-014126, 918-04125, 918-04125A, 918-04125B, 918-04126, 918-04126A, 918-04126B Toro: 1120370 This is a compatible replacement part manufactured by AA Ignition. This spindle assembly kit is NOT a genuine OEM part. Vehicle makes and their associated vehicle models and part numbers are used in this listing only to identify the vehicles this spindle assembly kit fits.