This convenient storage rack easily attaches to straight or tapered, vertical or diagonal rails and is constructed from 1″ Dia., marine grade 304 stainless steel tubing and attachment hardware. Designed to fit rails from 7/8″ to 1-1/2″ diameter it’s wide enough to fit all of the most popular kayak or board sizes. Magma’s exclusive quick release knob system allows each arm to be instantly rotated out of the way when not in use or swung in tighter to fit smaller/narrower kayaks or boards. Each arm comes with pre-installed UV resistant padding and has two tie-down attachment points for securing straps when underway or simply use them with a cable lock to safely store your toys when at the dock.