FEATURES: Constructed with UV-stabilized, fiberglass-reinforced plastic for durability Adjustable center joint moves in 15-degree increments Stainless-steel fasteners offer lasting functionality and a sturdy connection Mounts Lowrance Hook2, Lowrance Elite, Garmin Striker Plus, Garmin EchoMAP, Humminbird PiranhaMAX and Raymarine Dragonfly fishfinders and chartplotters on your rails or inflatable tubes with ease 3-axis design with top and bottom friction joints and R-Lock joints can hold fish finders up to 3.3 pounds