The fourth picture shows the 60 mm axle compared to a normal bar with a diameter of 28 - 30 mm.
This bar has been used by Strongmen for years in competition and training. It's larger diameter shaft makes it a beast to hold when loaded up for a Deadlift. To give you an idea of the size of the bar, grab the end sleeve of a regular Olympic sized bar. Yes, it's that thick!
If you're looking to add some serious grip training to your routine or are a serious Strongman competitor then this is the bar for you. The Axle can be used for Deadlifts, Squats, Bench Press, Overhead Press, Clean and Press, Bent Over Rows.... the list goes on and on.
With the growing popularity of functional training this bar has also become popular with many Athletes who follow the functional training-Strongman program or who want to make "Grace" a little more interesting.
It's versatility and robust design make this an essential piece of kit for any strength athlete.