This is the strongest laptop cable lock I have ever seen. See the comparison between this giant lock and a normal laptop lock. Do not mix it up with standard DefconCL with 4mm-diameter cable; this is a DefconCL UltraMax with 8mm-diameter cable. I have been using it in the office and it gave me 100% confidence. Selling as I am moving abroad… $18 for its like new condition; that’s only 1/3 of the original price.

https://demo.batavi.org/targus/cable-locks/asp02eu/targus-defcon-cl-ultra-max-notebook-cable-lock/#.U_eR-HGMi_w

http://targus.com/uk/drivers_manuals_archive.asp?sku=ASP02EU