SurfStow Transport SUPRax 50050-2, Stand-Up Paddleboard Rack, Boat Mount, Single Board System Secure your board to your boat fits 7/8 inch, 1 inch and 1-1/4 inch Unique rotating clamp allows for mounting on angled stanchions 061 aluminum alloy, polished, anodized Heat press, die cut, EVA protective foam Heavy duty shock cords keep boards in place