Large dual side opening molded panels provide easy access to a complete 17 piece tool kit and all of your under saddle gear 17 piece tool kit includes 2 3 4 5 6mm allen wrenches phillips flat screw drivers 8 10 mm open wrenches 14g 15g mavic m7 shimano spoke wrenches universal chain tool with chain hook 2 tire levers a glueless patch kit the chain tool is compatible with single and multi speed chains up to 12 speed not including campagnolo 11 speed hollow pin chain