Providing the trusted protection that has made Kensington The Professionals' Choice in laptop security for over 25 years, Kensington's Locking Bracket for 13.5'' Surface Book sets the standard for securing Microsoft's 13.5'' Surface Book models. Providing vigorously tested, non-invasive locking technology that is supported by Kensington's innovative common keying system, the Kensington Locking Bracket is the superior security solution for Surface Book.