All aluminum anodized construction. Great for salt or fresh water. Easily accommodates 4 rod heads with its 20? Crossbar. Smooth and easy pole angle adjustment. Easy two knob removal. Mounting plate is flush with carpet – No more stumped toes. No tools necessary for use. Our patented Spyderlok Technology insures tight secure locking angles. Exclusive height adjustable crossbar 12? – 20? 360° rotational cross bar. 360° rod holder rotation. Sure lock adjustments with SpyderLok teeth. Designed for spyder rigging. For pushing or pulling crank baits. Fast or slow troll with easy. Rugged design built to handle what you throw at it. R-101 included in box.