strong 10 mm locking head - with only 10 mm diameter hidden pin technology - patented anti-pick technology ensures that the lock cannot be manipulated The lock head is designed for the thinnest laptops and devices high quality product The trusted industry standard for nearly 25 years and compatible with Kensington Security Slot found on most laptop computers. The swivel bar attaches securely to the inside wall of the device for a higher level of security.