Cleat maybee not but a device for securing a rope. It started as a handhold on Exlex but soon due to its increadible strenght was also often used as a device for securing ropes.
Now on the Exlex the Canoe Yawl it will replace the stainless fittings. Its a fraction of the cost, a fraction of the weighrt, takes a fraction of the time to make and it distributes more easily the forces over a wider area the basic idea of strenght.
Below a few pictures of how its made.
To be continued…