Astro Pneumatic Lock Wrench Universal Fuel Tank 78935 Astro Pneumatic Lock Wrench Universal Fuel Tank 78935 is needed to remove fuel tank locking rings on fuel senders for many 2004 and newer vehicles. Astro Pneumatic Lock Wrench Universal Fuel Tank 78935 applications include GM, Chrysler, Dodge, Ford, BMW, Hyundai, Jaguar, Mercedes, Nissan, Subaru, Saab, Volvo and more. Astro Pneumatic Lock Wrench Universal Fuel Tank 78935 is 7” in size and features a 1/2” square drive for use with a ratchet or breaker bar.