1Premium Clamp- Using for fishing rods and boat brackets. The G clamp base is made of aluminum with steel pressure screws. Adjustable clamping system to a range of track thicknesses, it is wide enough to slide over the ships track/barrel/side (clamping maximum opening 1-3/4 inches). 2Easy to Install- The rod holder has a clamp base to attach on objects. Open end grip design accommodates to all types of rods . There is no drilling needed for installation, and you can choose to have it surface mounted or rail mounted. 3360 Adjustable- By adjusting two different screw joints, fishing rods can be adjusted to any orientation you want. It was designed as a multi-function rod holder for a wide range usage from spinning, casting to spin cast and so on fishing for large medium and small fish species. 4Eco-friendly Material- This fishing boat rod holder is totally made of high quality and eco-friendly material--strong & anti-corrosion, constructed with high impact resistant heavy duty ABS. 5High Impact Resistant Construction- The construction is very easy to hold on the boat or kayaks which is very steady. Great fishing rod holders for boats or kayaks, it includes metal hardware.