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.