Borrowed my mid 2000s Craftsman mower with a Kohler engine to a neighbor only to have it choose that moment for the flywheel bolt to wiggle out. OEM one ground on the shroud to the point of melting and plastic welded itself solid. This item was an exact match, and after putting some locktite on the main bolt, I was back in business. It even has the correct magnet cutout and two centering nubs that lock into the flywheel.