Koyote, true, but how often do you actually use a chain tool on the road? I've been riding for 50 years and can't think of one time I broke or twisted a chain where I required a chain tool. Having said that, I might break one on the next ride ;-) I do carry one on long rides though, you know, just because...

However, how often do you use hex bits, Torx, Philips and tire levers? For me, it's about half of my on-ride repairs or adjustments. The other half is changing tires for a tube repair. That's why I opt for professional quality (and fitting) tool and bits. That's what PB Swiss is.

The only other tool I carry in my under-saddle bag is a Park spoke wrench. Those tools, two tubes and a Park patch kit is my standard carry and it all fits into a sweet Silca Mattone bag. I'll gladly sacrifice a few extra ounces to have a good quality tool that I know won't round-off a fastener. I can't say that about most of my multi-tools, and I have a few really good ones but their hex bits don't fit tightly like the PB Swiss does.

FWIW, I only carry a single Allen wrench, tire levers, tube and patch kit on my fixed and single speed bikes.

As a side note, a number of years ago I bought a set of the PB Swiss Allen wrenches. Oh man, I got spoiled. Once you use a PB Swiss even a Bondhus doesn't quite compare.