You can put them on any bar to turn it into a fat bar.
There are many advantages to the fat bar:
* Increased grip strength.Attitude. You don’t half-ass anything when you’re using a bar you can barely hold onto.
* Kinetic Linkage. Possibly the most overlooked element of any strength feat is the linkage between the muscles that are used in completing a given movement. If you plan on doing anything with the fat bar, you had better be gripping it with all your might unless you want to be pinned underneath it. By gripping the bar with extreme force your muscles will experience “irradiation” which is a fancy way of saying your forearm, bicep, tricep, deltoid, will activate (for most people their entire body will tense up, and this is a key element to strength training. Try to make a white-knuckle grip without tightening up the rest of your arm.
* Preventing Leakage: This could go with the previous point of irradiation, but the point is that by gripping the bar harder your body will have no break in your kinetic chain. By keeping your shoulder into its socket (packing your shoulder) during an overhead press, you prevent leakages and allow the stronger muscles to dictate the movement. Your tight grip will make this easier. Try shrugging your shoulders as high as you can before your next overhead press and you will see that your strength is nonexistent.