A Kensington Security Slot (also called a K-Slot or Kensington lock) is part of an anti-theft system designed by Kensington Computer Products Group. It is a small, metal-reinforced hole found commonly on small or portable computers and electronics equipment such as laptops, computer monitors, desktop computers, gaming consoles, and video projectors. It is used for attaching a lock-and-cable apparatus, in particular those from Kensington.
Locks are generally secured in place with a key or combination lock attached to a rubberized metal cable. The end of the cable has a small loop that allows the cable to be looped around a permanent object, such as a heavy table or other similar equipment, thus securing it in place.
Kensington locks are not designed to be an impervious protection measure.Because most computer equipment cases are generally made of plastic or thin metal, the lock can be torn out, though not without doing significant visible damage to the case. The cable itself can be cut if an individual has a wire cutter or bolt cutter sufficiently strong to cut through the cable material, which will vary between different brands of cable.
There are versions of the lock that use a numeric combination (like a padlock) instead of a key. There are other versions that use a traditional flat key