Designed for 13.5 inch Surface Book 2 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 device modifications, preserving the durability and aesthetics of your Surface Book. Steel-reinforced security bar provides strong anti-theft protection. Provides top-notch security with quality standards for torque/pull, foreign implements, lock lifecycle, corrosion, key strength and other environmental conditions. 5 mm keying system with Hidden Pin technology. Register and Retrieve program offers free and secure cloud-based key management and replacement.