This is the big brother to the Boggie Bar that Ken sells at AirModsNW. I got this one, the Big Boggie made with the trailer ball ring so I could pull planes around the airport and also push them into hangars. This is a big hefty bar, locks tight to the axle, and can also be used when pushing by hand. Here it is in the closed position: (left)
Here it is in the full open position: (bottom)