If your boat's rod holders are made of zinc alloy and beginning to corrode, or if you like to fish and your boat has no rod holders at all, consider a pair of these rod holders by Attwood. They are made of strong, corrosion resistant 304 stainless steel for many years of trouble free service. You can install them on vertical or horizontal rails. Clamps can be adjusted to fit rails from 7/8" up to 1" in diameter. Each includes a plastic liner and will fit standard rod butts under 1 1/2" in diameter. Sold individually.