I needed one last winter when my 8 speed chain snapped and wrapped itself round the cassette, bending that beyond repair, as I was commuting home in the rain and the dark….
The chain breaker on the multitool had lost its pipn, so was useless….
I knoe carry a Topeak dedicated chain breaker in my seatpacks, as they really don;t weight that much, are easy to use compared to multitool ones, and really dont; add weight compared (as seperates) to carrying an all in one tool.
They’re thr sort of thing you’ll lig around for years, but when you need one, nothing else will do and you’ll be glad you did!
But who carries 4 spare quick-links!!!!