The Mac Book Air Locking Security Case is a protective shell that has an integrated locking slot to use with a security cable lock. A perfect companion for your Mac Book Air the case bundle is an excellent choice for school, home or business use. The protective case fastens to the lower part of the Mac Book with tamper proof screws for ultimate security, a hardware kit is provided to replace the existing screws, & the upper cover is clipped on to complete the safety shell. You can choose from a variety cable locks options or use your own standard computer cable lock.