Sawyer's traditional "A" type open oarlock is made from the same super-duty bronze alloy as the Cobra Oar Lock with a more standard design. This specially formulated "Mag 70" high strength bronze alloy is chosen for its high tensile strength and corrosion resistance, resulting in a super heavy-duty oarlock that is extremely durable. The open horn design allows for a full range of motion and adapting on-the-fly to changing water conditions. These oarlocks can also be fine-tuned for a precise fit.