30 function multi-tool packed into a custom protective case that mounts to any round tube or seatpost (ø25 mm – ø33 mm) with a secure quick release strap The chain tool is compatible with single and multi-speed chains up to 12 speed, NOT including Campagnolo® 11 speed hollow pin chains. Size:  10 x 4.6 x 3.5 cm / 3.9” x 1.8” x 1.4” Allen wrenches:  1.5 / 2 / 2.5 / 3 / 4 / 5 / 6 mm Functions: 30 Spoke wrenches:   14G / 15G / Mavic® M7 / Shimano® compatible Tool material: Chrome vanadium steel Weight: 233 g / 8.20 oz (w/ Clip)