We know that blade protection is key to a long tape life. Our metal case (MC) keeps the blades safe. These long, fiberglass tapes have a compact, closed metal case that fits nicely in your hand. The flush-folding crank pops up for easy rewinding. If you're measuring alone, the metal catch hook is set at zero, so there's no need for a correction. These are very popular with users that primarily do interior measurements.