Application Scope: The quick fuel line removal tool are specifically designed to work with 5/16 inch and 3/8 inch fuel lines, and A/C line service. It is fully compatible with 1989 and newer GM vehicles, 1990 and newer Ford vehicles, and some 1990 and newer Mazda vehicles. Easy to Use: To disconnect the fuel line with confidence, first relieve the pressure and wait for the locking mechanism to release with a distinct 'click' sound. Then, the filter can be easily pulled off.