Birzman diversity 17 multi toolthe birzman diversity 17 multi tool offers the performance that its name suggests it is very diverse in what it can achieve. Featuring 17 functions in a compact and convenient package, it provides the rider with solutions for tightening bolts, breaking chains, changing tubes and with inclusion of the co2 air adaptor, inflating tubes and tubeless setups.features functions 17 material body high polymer tools chrome vanadium chain tool alloy steel dimensions 10 x 4.6 x 2.4cm hex head 2, 2.5, 3, 4, 5, 6, 8mm torx head t25 chain rivet extractor 8 12 speed, 3 32 single speed spoke wrench 3.2, 3.4 phillips head screwdriver 1 flat head screwdriver 4.5 tyre levers one with a spoke hook, the other with an air release knob for schrader valves chain hook co2 valve head presta schrader compatible with threaded cartridges weight 178gbuy birzman workshop from chain reaction cycles, the world's largest online bike store.