CE Smith Mid-Mount Clamp-On Rod Holder-Replacement Parts and Accessories for Tournament Fishing,  Rod Fishing, Deep Sea Fishing and Trolling 316L Stainless - Mirror Polished Fits 1-1/2in or 1-21/32in OD Rail Mount to Vertical or Horizontal Rail Four screw clamping is stronger, tighter and more secure 10in long with 1-5/8in ID