These are the most frequently used hex sizes on most of my bikes. The ball driver increases the utility of this tool because it is capable of some awkward angles. This is a high quality Park Tool. I keep this one at the work stand attached with a magnet.
Thought it would be more convenient than using individual Allen wrench. Doesn't feel as secure in the bolt and there are places where it is too bulky to use. It's ok - not a godsend for sure.