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