Doing a timing belt job and dreading messing up the engine timing? This Performance Tool camshaft gear lock (model W80400) is here to save the day! It's a simple but brilliant tool that locks the cam gears in place while you replace the timing belt, ensuring the valve timing stays perfectly aligned. This prevents the costly and time-consuming mistake of having to retime the engine. It has a universal design that works on many engines – single, dual, or even quad cam setups – and can also be handy for diesel injection pump belt jobs. You just clamp it between the engine block/head and the back of the cam gear; it installs in seconds without any extra tools. Made from high-impact plastic and steel, it's sturdy enough for repeated use in your shop or garage. A must-have tool for any serious DIY mechanic or professional technician to make timing belt replacements faster, easier, and mistake-proof. Keep your projects on track and your wallet happy!