BOA dials can be found on a variety of bike shoes. It is great for riders who like to make shoe adjustments while riding, since tightening the shoe only takes the turn of a dial. They will wear down, however, and need to be replaced.
Use a torx wrench to remove the outer part of the dial, then remove the inner part with the cable, and cut the cable. Pay attention to how the cable is routed. The cable will run through a series of holes and overlap to secure itself.
Don't pull the cable tight while running it through the holes. Once the cable is installed, trim the ends, and put it back together.