I have the style that the OP shows in the first picture: bad setup, this might be tough to visualize, but, the hook makes me nervous because it likes to "climb" off whatever edge you put it on. I don't recommend them at all. I've used the style with the "flattened" hook and they are much more secure.






Now that's more like it, those would work on anything. I will definitely be buying a set of those. THANK YOU for recommending!