Powerfull and reliable retractable skeg system pro for composite, thermoformed and polyethylene kayaks. This injection moulded skeg box is made to stay clean from dirt and other obstacles to reduce the risk of jamming. The skeg blade is well supported to the skeg box with integrated framework. The box is simple to install either from in- or outside in the production and it can also be retrofitted. The system also includes skeg control unit. The skeg control unit can be installed in to the deck of the kayak with or without a recess. Control unit is simple and precise in use. Note that this control unit can also be combined with other skeg systems as well.