Enhances the Essential8 mult-tool by adding five functions Includes: chain breaker, tire plug insertion tool, spoke wrench, valve core tool, master link storage, plug strip storage, and knife All tools are held together by magnets and are easy to take apart and put back together Chain breaker is made of corrosion resistant and hardened stainless steel Chain breaker can break 1012 speed chains (SRAM flat top chains included) as well as Campagnolo EKAR 13 speed Master link storage holds any 10 to 12 speed master Link by magnets (master link is not included) Spoke wrench is for #0 nipples, it fits the most common 3.23mm nipples like DT Swiss, Sapim and many other Hardened stainless steel plug tool Stainless steel knife blade Fits any Incredible carrying option Requires straight section of at least 119mm to be mounted inside the bar