A Toledo Leak Down Tester is an important and useful tool in the hands of any enthusiast or mechanic, helping you to diagnose internal engine faults safely, quickly and accurately. Unlike standard compression testers which rely on measuring internal engine pressure from cranking, this tester utilises an external air source to deliver a uniform flow into the cylinder to give you a true idea of the amount of compression being lost through leakage. This cylinder leak down test kit contains adaptors for any petrol engine running a 14mm or 18mm spark plug, with a quick connect hose that allows you to get started with one click and twist. It features dual gauges to show you the cylinder pressure as well as the leakage percentage, to ensure you get a real time view of the results without having to calculate it manually. The tester is constructed from industrial grade aluminium teamed with heavy duty brass fittings to ensure that it stands up to repeated usage, and comes with rubber booted gauges to help prevent any accidental damage from dropping. With a custom moulded case that helps to keep everything safe and tidy in your tool cabinet, you can't go wrong with this fantastic Toledo kit.