This is a brief video showing the simulated wheel corrosion that Ken-Tool tested its Shark Fin separation bag.
Test one is a nylon nut on 22.5 dual wheels.
Test two is using 3M metal Adhesive to glue the dual together.
Test three is a 1" weld where the duals are welded together.

The Shark Fin is used to break outside duals, inside duals, and steer tires away from wheel hubs after they're corroded together and can't be removed simply by removing the lug nuts.

The Shark Fin is unique in that it will not damage or mar aluminum or Chrome wheels and can be used on 15" wheels all the way up to 24.5" wheels for Automotive, light truck, and heavy duty applications.