This small chain tool goes anywhere and actually
performs like a shop quality tool. The fine thread, special
"V"-shaped handle, and super strong replaceable pin
make chain removal and installation a breeze. The CT-5
works on any derailer chain (including Hyperglide®) and
has a "shelf" for loosening tight links. At only 77 grams,
it1s the perfect take-along chain tool. Works great on 9
speed chains as well.
I carried one of these 3/4 coast to coast. I remember wishing they could have made it a bit lighter, but it's not bad. Better to have one and a few spare links than a broken chain in the middle of nowhere!
I use it at home when I need to work on a chain, too. No need for a fancier chain tool unless you're a full-time mechanic.