MagiDeal High Duty Stainless Steel Boat Kayak Yacht Fishing Rod Holder Rack Equipment-- Clam Max 5cm 100% brand new and high quality. Perfet for boating,kayak and the rail of yacht. Fully adjustable up and down and rotate 360 degrees. Clamp-on system that adjusts to a range of rail thicknesses and it is wide enough to slip over the boat rails/gunnel/side(Clamp Max.opening 5cm/1.97 inch). Durable, rust-free stainless steel construction.