What do you want from your fender holders? Most boaters would agree that versatility, durability and style are the key. Polyforms True Fit Fender Holder system is the answer. The True Fit Fender Holder is a modular system that fits rails from 7/8 to 1-1/4 at any height or any angle. Because of its modular design, you can mix or match sizes or add on as your needs change. When you choose Polyform True Fit Fender Holders, you select one of the most popular fender holders on the market.