I got these to attach items to a keychain.  They have served that purpose fine.  They obviously are not anything like carabiners used in climbing, they only resemble them by shape.  The arrived in a variety of colors as pictured.  They are secure enough for my purposes.  The part that opens is spring loaded and closes fully but it not secured by anything such as a screw lock.  But again these are inexpensive small items and are strong enough for the purposes I am using them for.  They arrived quickly and with traditional circular split ring keychain rings with each carabiner too which will help if the item you are attaching does not have a hole large enough to attach directly to the carabiner.  Fine for light use at about a buck each.