These are quickly found links. I could do better prices here in DK. My experience says the TL-CN 33(or earlier 30/31) is the best. Have tried the large ParkTool,Rohloff etc. in everyday workshop use,and the large shimano rules. I`ve heard the little shimano does ok too. IMO the little cheap ones are for emergency use only,it`s damn important the chain is properly connected!
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I've got 3
An old Madison one from circa 1989 which is still in constant use, has a replaceable pin, and adjustable hollow back screw that allows the ricotta to pass into it while supporting the side plate.
A cheap modern one that works fine, no frills
And a tiny one that lives inside a bar end along with another multitool. Never used it and it's one the mrs' bike but it looks like it would work ok. I'd trust it in an emergency at least.