The Kensington Security Slot is a small locking mechanism used on devices, such as laptops, computer monitors and video game consoles. The Kensington lock then connects to this slot to lock the device securely to a desk or other solid surface to prevent theft. The locks use either combinations or keys for a convenient way to protect your expensive equipment. While not unbreakable, securing your valuables with a Kensington lock can save it from an opportunistic thief.