My first bike multitool was a hex key set from Park Tools. But then for Christmas my father-in-law sent me a Wolf Tooth 8-Bit Pack Pliers and whoa, this is an impressive piece of hardware. It has 17 tools in a slim, light, but tough package. It has a little master link keeper too, for repairing chains on the trail, in addition to the link compressing pliers. I haven’t yet, thankfully, had to use the chain repair tools yet, but it slips easily into any bike bag, even pockets, and it’s the best-designed bike tool I’ve seen.