Serfas has once again raised the bar by producing the most innovative and advanced mini tool on the market. The ST-17i mini tool combines all the bits you need for minor repairs, chain tool, spoke wrench and an integrated CO² Inflator all in one. The compact size allows you to travel light while providing all the tools you may need when a mechanical issue arises. The sophisticated chain tool with retainers make chain repair a breeze while keeping both ends of the chain off the ground.