Your notebook is not just a monetary investment, but a source of sensitive data and it should be secured with this keyless 4-wheel combination lock. With 10,000 personalized combinations, aircraft-grade steel cable, and patented T-bar locking mechanism, it provides the most secure defense when locking into the Kensington security slot featured on 99% of notebooks and computer devices. Includes a rubber cable tie to manage cable cord for portability. From Kensington, the world leader in notebook security. Kensington Lifetime Warranty.