Engineered to be Kensington???s smallest lock for laptops and other devices without compromise, the MicroSaver?? 2. 0 Portable represents the next generation of laptop security for mobile users. The compact (10mm diameter) lock head has been designed to meet the requirements of ultra-thin devices that use the standard Kensington Security Slot??? (T-bar???) found on 90% of business devices worldwide. The self-coiling carbon steel cable stretches up to 1. 8m or shrinks down to 76mm for easy packing.