Fun story: I bought this item originally from an ebay seller who was selling what I came to find out was a counterfeit item. The counterfeit tool came apart into 30+ pieces from the vibration of my gravel bike saddle bag. I contacted crankbrothers, and they sent me a PDF detailing the characteristics of the counterfeit item.
Not the case with the tool I purchased from Bike Tires Direct! This is a genuinely useful tool to have on every ride. Sturdy, extremely well made and a great price. The lesson learned is to always purchase parts from a reputable seller like Bike Tires Direct.
This is what I was looking for to carry when I ride. It has a lot of tools and is pretty compact. Any tool for your under-seat bag is going to be small and a little cumbersome to use, but this works. I have one of these for each bike but slightly different models. One came with a stainless carrying case, which isn't very useful. The top of the case falls off and the tool rattle in the case, so I threw the case away and just put a rubber band around the tool to keep the chain tool closed. The other version I have is better - instead of a case it comes with a little plastic cover which has a small compartment for a chain link and tubeless tire plugs. If fits tight and doesn't rattle - much better. I think both are a little over priced, but are good tools.