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.