These SWORKz performance T-steel balls are factory replacements for the ball differential in the S12-3 2WD buggy platform. The set includes six metal differential balls designed to maintain smooth and consistent power transfer through the diff. Replacing worn diff balls is a common maintenance step for keeping a ball differential performing accurately. Features: T-steel construction for durability Set of 6 balls Designed for ball differential service 7/7/26 cs