The Chassis Key Cable Lock prevents unwanted access to the components of desktop computers or any other piece of equipment with a threaded steel collar. By locking down the chassis, it secures the valuable components inside, such as the CPU, memory and graphics card. Simply remove an existing screw from the computer chassis, and replace with the key cable lock screw head. The patented design features convenient, easy-to-use push-button technology to easily lock and unlock your device. A hardened steel head and 6' coated, galvanized steel cable ensure superior strength and deter tampering.