Originally Posted by spider
I need to see what they look like
here is a stock photo of the pro-loks, which uses welded stainless.
that clamp on the oar stop is a bitch and needs to be redesigned. The snare wire is to be cut off at first sight before it cuts your leg off. But the concept seems solid. If you exert enough force, the horns and or collar deforms slightly and unpops off the rounded screw heads that are applying pressure in the dimples in the collar.
I think the posilockers will not release unless something shears. Either the oar lock stem, the pivot mechanism, or the oar shaft. In Laura's case I think think it was the oar.
If you want I can get you detailed pics of the weld and the thickness of the material. If you wanted to make a posilocker design out of this you need to come up with a way to bend the stainless steel collar to accept a grant's oar right ... but you will probably want to pay the guy in Payette some sort of royalty for ripping off the concept of his design.
I think these pro loks retail for $120/pr and don't require rope wrap, oar sleeves, oar rights. Also they give you at least about an inch more height out of your existing tower and can be made with the shaft any length you need (if you want to put 4" risers). I would think the stainless is pretty strong and won't bend under normal force.
FYI the diameter of the inside of the collar is larger than a bare oar shaft but too small to use an existing oar wrap. I don't know if the guy who makes them can machine them differently to work over a wrap. I know there is some adjustment in the side screws and it looks like he turns the collars on a lathe. So maybe can add some OD and ID to the material if you are a fan of the rope wrap protecting your oars from surface scratching, etc. The material is pretty "greasy" feeling maybe hdpe?