I am looking for a clevis pin that is quicker than a standard with a ringding. I have seen the Attwood spring loaded with tether that looks like it would be perfect for what I want, but it is really just made for a cheap bimini. I cannot see what the problem would be. It is stainless (no idea what type) and 1/4 inch. But I would rather find something like it that is made to hold up something like the mast on a 16. I have been looking around and have had little luck. The quick pull type are hollow and I do not trust them. Would anyone trust the cotterless? I have not seen one with a tether, but I could easily fabricate one. I liked the Attwood because it looks like it has a nice lock in place mechanism. I am nervous about trying something like that on my shroud.