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