CE Smith Adjustable Clamp-on Rod Holder-Replacement Parts and Accessories for Tournament Fishing,  Rod Fishing, Deep Sea Fishing and Trolling Turns and Locks in 10 Degree Increments with Hidden Adjustment Teeth Fits 1-1/4in or 1-5/16in OD Rail 316L Stainless - Mirror Polished Four screw clamping is stronger, tighter and more secure 10in long with 1 5/8in ID