There's not much to say about this item. As can be seen in the pic, it's a solid piece of metal with six tools along the edges. Does an effective job at basic roadside repairs, although you won't have every size allen bolt you need, particularly if you're on the road with your kids and their bikes along with your own. Also the length of the item can get in the way of screwing or unscrewing a bolt - meaning you might only be able to turn the bolt 20 degrees at a time. That being said it's a quality, reliable, simple tool and I expect it will last a lifetime.
You will need this tool to install your cassettes. The updated version with the guide pin makes the tool foolproof. Improvement on an already great design. Made in the USA too! Whats no to like!
Finally got fed up with my Park HCW-6 (fine tool for travel but just to narrow on the hands and not quite enough leverage for removing pedals) and picked up this thing. It is a beast and just wonderfully designed. I've got older Speedplay X series pedals that only have one section for the wrench which makes orienting them to a spot where you can get leverage a huge issue. The two 15mm wrench openings at 30 and 45 degree angles make finding the right leverage spot easy and it's so long that you just have to firmly press down to break loose even the most stubborn pedal. Wish I would have bought this years ago.
For years, I'd tried every tool I had to stop the chainring nuts from slipping when tightening, but nothing worked. This tool does the job and is cheap. If you don't have one, pick one up before you need it.