Most locking carabiners are made from metal, with stainless steel and aluminum the most common materials.
The listed weight ratings range from about 10 lb up to 75 lb; some individual listings also specify a 25 lb rating.
Slide-to-lock designs use a small sliding sleeve or slider that you push into place to secure the gate. Twist-lock designs use a central twist mechanism that keeps the gate locked until you twist it to release.
Sizes vary across the selection: lengths range from about 0.3 inches to 5.9 inches, and widths are roughly 0.87 inches to 1.9 inches depending on the model.
Common uses include keeping keys organized, clipping water bottles, and securing small gear or keychains to bags and belts.
Convenience features include independently locking gates, sliding plastic sliders that lock the gate in place, and twist or center levers that hold the gate closed until released.
