I don’t think I could trust those for a dinghy tie down….. I am already in on the turnbuckle cable tie downs. I bought the snap shackles from sailrite. They are cool I have one on my desk to play with….3/8" Tie Boss, or not beefy enough? Rated for 300 lbs.
https://tieboss.com/collections/all-products/products/3-8-inch-tie-boss-10-rope
I have a number of these and keep finding new uses all the time. Pretty cheap. Metal hooks appear to be zinc plated so stainless hooks would be a good addition if used on a boat.