Under normal conditions (on a flat road for example), a regular car jack is easy enough to use. However, what if you're off road in a muddy area or any number of other locations that make jack placement difficult when the ground refuses to help?
Well, just throw this sucker on your exhaust pipe and fill it up! It works in a matter of minutes and spreads weight distribution out more evenly then a regular jack. Plus, literally anyone can use it!