Replaces worn or damaged O‑rings and seals used in starter box wheels and pulleys to maintain proper grip and smooth operation. Made from durable rubber, these rings resist wear and help preserve traction between starter components and the engine flywheel. Their precise sizing ensures a snug fit on compatible starter box wheels or hubs, reducing slippage during cranking. Easy to install, they help restore reliable starter engagement and prolong component life. Suitable as a direct replacement set for maintaining dependable starter performance.