An easily accessible hidden compact chain tool kit housed in handlebar ends for your mountain bike. Features CrMo steel chain tool for single and multi-speed chains up to 13-speed, including Sram® Flattop chains and Campagnolo® hollow pin chains. Included chain hook holds links during assembly. The handlebar needs to have a minimum straight section length of 105mm at the end and internal diameter between 17-21mm to allow the tool to fit.