JAGWIRE INLINE INDEX CABLE ADJUSTERSThe Jagwire Indexed Inline Adjuster allows you to make easy adjustments of your brakes or shifters without stopping or getting off your bike. They are perfect for bikes with mechanical braking and/or shifting. The indexing feature allows you to dial in the perfect tune and hold it. The 5mm size fits most popular brake housing and the 4. 5mm size fits braided shift housing. Features Indexing adjuster allows you to dial in the perfect tune Inline adjustmentallow you to make adjustments while on the move5mm size optionworks with brake housing4. 5mm size optionworks with braded shifter housing | Jagwire | Inline Index Cable Adjusters | Black |Alloy, 4. 5Mm Housing