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. - Chain tool requires 4mm bit, or wrench to operate - Material: hardened steel / engineering grade polymer - Limitations: handlebar ends with minimum 105mm straight section ID range 17 - 21 mm - Weight: 52 g / 1.83 oz