The Travel Cable has a looped end cable and is available in standard 3/16" diameter or optional heavy duty 5/16" diameter. The Office Cable is a stationary cable with an anchor that is glued or screwed to the desk. It is available in standard 3/16" diameter or optional heavy duty 5/16" diameter. The Combination Cable includes both the above cables and one head lock. The lock head is attached to either cable as needed.