Amarine-made Stainless Steel 316 Heavy Duty Rail Clamp Angle Adjustable Rod Holder - 8201SR This heavy duty rod holder clamps onto the rail to give a tough reliable mount for your rod. It has adjustable elevation with a solid knurled knob. Clamps to rail with two stain less steel clamps. Made of high polished stainless steel 316 for rail 25mm-32mm