Designed for 13.5’ Surface Book 1,2 and 3, to provide professional-level security and superior performance Non-invasive locking technology attaches to the bottom of the screen for an easy-to-use security solution that requires no modifications, preserving the warranty and aesthetics of your Surface Book Steel-reinforced security bar provides strong anti-theft protection 5mm keying system with hidden pin technology offers a patented anti-pick solution Register & Retrieve program offers free and secure cloud-based key management and replacement