These are designed to secure halyards and are used as railholders. They can also be used to securer an awning, luggage or equipment. They are mounted on a hard or inflatable side between any FASTen® mounting platform and a mount. One or two holders are mounted at angles of 180°, 155° and 130°.Changing the angle of the holders allows the halyard to follow the contour of a boat side. The holder can be used for stretching and securing a canopy. The design provides for additional holes to secure spring hooks. Set of 2 pcs.