I use the Habor Freight chain tool. I got mine for $10 and have used it 5 or so times never broke a pin or had a problem. It says its just a chain breaker but if you flip over the extra pin and use it on the bottom it work just like every other chain tool.
Bump (I searched, obviously). What’s the consensus for the best chain tool out? I’d rather spend money upfront than curse a shitty tool later.