Perko 1267DP0ZNC Round Type Rowlock Horns, Plain Go to amazon.com Related posts Top 6 best oar locks FeatureZinc alloy rowlock hornsThis item is sold in a pair5-year warranty DescriptionPlain round type rowlock horns. Zinc alloy. Pair. Shank O.D.: 1/2"/Shank Length: 1-3/4"/Horn I.D.: 2".