The 8-Bit Chainbreaker + Utility Knife Multi-Tool has four functions. It has a chainbreaker on one end and a retractable utility blade on the other. The chain tool is operated by an included 3mm hex L key that doubles as a tire plug inserter. A machined slot fits the L key and converts the entire multi-tool into a tire plug inserter, with the forked end of the L key extending outward. The handles of this multi-tool slide open to provide storage for tire plug inserts, a valve core, and a spare mini utility blade. The fourth function of the tool is the 16mm head of the chainbreaker end that can be used to tighten crankarms on the road or trail. Item ships directly from the Wolftooth warehouse.