Application: Used for Honda, VTEC, Toyota, Nisan and other Japanese vehicle engines to adjust valve clearance. Designed for engines with a 12mm jam nut and slotted valve adjusting stud. Specially Design: 7-1/2″ side handle provides leverage for loosening tight jam nuts, unique all-in-one design tightens jam nut while preventing stud movement. High-quality and Durable: Made from high-quality materials, this valve adjustment tool withstands frequent use and provides reliable performance, offering excellent value for money with long-lasting durability essential for any workshop. .