This 14mm piston stop tool is a must-have for engine maintenance. Designed for CAM indexing, valve adjustment, and distributor installation, it offers a reliable way to locate the Top Dead Center (TDC). Its innovative design features bolt-type screws for easy insertion into spark plug holes, and plate bolts that work even with a closed cylinder head. Crafted with zinc bichromate surface treatment, the tool resists corrosion and ensures long-lasting durability, making it a top choice for both professionals and DIY enthusiasts.