Sawyer Canyon Oar Lock (Single)These oar locks were designed by legendary Grand Canyon boatman and owner of Professional River Outfitters Bruce Helin. They are ideal for whitewater rowers due to their strength, usability, and new blunt tip. According to Bruce, advantages of the Canyon Oar Locks are: Less crabbing binding of oar in lock allowing the oar to be feathered through a greater range of motion making it easier to row standing up Consistent contact of oar stop to oar lock