These open-base cleats are intended for freshwater use only.You'll find these strong, attractive cleats are ideal for anchoring, docking and general purpose applications. Fasteners sold separately. ModelOverall LengthBase DimensionsMaximum Rope DiameterQuantityFastener Size2555964"2 1/8"L x 1 1/2"W5/16"24 x #102556046"3"L x 1 3/4"W7/16"14 x #103996288"4"L x 2 1/8"W5/8"14 x 1/4"