These hooks are the largest. I have a small garage and don't like messy floors. So I try to hang things up. I already have a few of these hooks holding my blower, luggage, holiday door decorations, etc. What's really great is that they're incredibly easy to install. Simply take a screwdriver (an electric one works best, but any screwdriver will do), screw in the screws and hang the curtain. I use them on drywall; on a hairpin it may not be so easy. But you can hang 40 pounds of drywall, which is enough for all my stuff. I am not inclined towards needlework; just a woman with a house and a garage and things to hang up. So I like things that are simple, don't require much intelligence and work. I first bought them from Lowe and figured if I had a problem I would return them. There were no problems; came back and bought more. I just bought a set from Revain. It couldn't be much easier. More recent review - just bought another set - one to hold my yoga mat in my bag and another to hold some gardening tools.