Amazon.com: 1 Pair Clamp On Oar Locks, 1 Pair Boat Oar Lock Socket, 1 Pair Oar Lock Socket Side Mount 1 3/8in to 1 3/4in Inner Diameter Clamp On Row Lock Brackets : Everything Else
Oarlock Clamp-On | Calcutta Outdoors
Amazon.com : Milky Ocean-Oar Locks - Main Shaft Made with 316 Grade Stainless Steel - Easy Clamp-on Design for 1-1/2"(38.1mm) to 1-5/8"(41.5mm) Oars - Fit for 1/2" Oarlock Socket - 2 PCS