The Nitrous Halflink chain is, well a half link chain. It is made to help dial in the rear end length on frames with short dropouts letting you slam the wheel more forward than a standard chain will. The thick side plates with heat-treated pins reduce stretching. The Nitrous Halflink is compatibility on small drivetrains. Riding a halflink chain does not make you half a man.
Half Link 1/2x1/8