Anyone know of these? Do they "work" ie help with canti brakes? Were they a thing back in the day?
http://www.ebay.co.uk/itm/ALLOY-22-2mmH ... TmISJ1FWSQ
http://www.ebay.co.uk/itm/ALLOY-22-2mmH ... TmISJ1FWSQ

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