Brackets are made from Aircraft grade aluminum. Rotary cam design keeps the fender rope secure and locked-in Maximum line: 8mm( 5/16" inch) Great for use on most gunnel track systems :Versatrack, Lund, G3,Ranger, smokercraft boat, starcaft boat, Excel , expree and Lowe Boats . Easy to install / reposition / remove

Brocraft Fender Holder for Tracker Boat Versatrack System/Versatrack Boat Fender Holder / Fender Hanger , Great for use on most gunnel track systems ,Rotary cam design keeps the fender rope secure and locked-in .Maximum line: 8mm( 5/16" inch).