Park CT-5 Chain Tool
$ 17.00
Our go to in the workshop even though we have full size chain tools that cost 3x as much.
More expensive chain tools were designed to be better at fastening a chain together so that it was less likely to break in use.
This is unnecessary now that chains have a quick link.
Today, the only purpose of a chain tool to shorten a chain, so really is no need to buy a $30 to $50 premium chain tool.
Small enough to take along on multi-day trips.
Compatible with 5 to 12 speed chains from Shimano, KMC and Sram.