Jagwire pro indexed inline brake adjuster 5mmthis alloy barrel adjuster from jagwire is used for indexed brake adjustment it is perfect for mechanical disc brakes or even rim brakes to allow accurate fine tuning of cable tension on 5mm brake housing it is supplied as a pack of 2 and is constructed from a lightweight alloy features materialalloy dimensions5mm quantity 2 packbuy jagwire components from chain reaction cycles the worlds largest online bike store