I could hardly install them because my stays are quite big. I no longer know if the maximum size is specified in the product label but I think it is useful to specify it. A little adaptation was necessary for me. Otherwise the cleat does the use for which it is intended perfectly.
A practical little helper for attaching flag lines, but also, for example, a halyard that should not hit the mast. Can be mounted solidly with the metal clamp if you do not tighten the fastening screw too much (plastic thread).