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