This x-small bit fits the proprietary bits found in all kinds of Microtech models, and with the help of a standard 1/4" hex driver, allows you to disassemble** and maintain your knives.
Microtech uses proprietary hardware for two reasons. Firstly, because unique hardware adds a cool, modern, and distinctive touch to their knives. Secondly, and perhaps more importantly, is to discourage well-meaning, but unfortunately unprepared individuals from disassembling a complicated knife and ruining it. Doing so can void your warranty.
Simply put, if you don't know what you are doing, do not attempt to disassemble your Microtech. Rather, contact Microtech's warranty department, where a trained knife technician is anxiously awaiting your call. If you are confident in your knowledge of how your knife is supposed to function, how it comes apart, and how it goes together, this bit will help you get the job done.