"Ultra-handy for outdoors enthusiasts, Nite-Ize S-Biner Double-Gated Carabiner offer a variety of uses to the enterprising adventurer. Made of high-quality, weather-resistant stainless steel, these unique 2-in-1 S-Biners hold, secure, and connect everything from house keys and cell phones to technical camping gear. Durable center bars also work great as anchors for valuables. Smaller-sized S-Biners are excellent for connecting 2 zipper sliders on backpacks, duffels, and suitcases. Not for climbing. #2: 2""H x .88""W. #3: 2.63""H x 1.13""W. #4: 3.5""H x 1.5""W. All the usefulness of a single-gated carabiner, times 2 Great for boating, camping, travel, biking, hunting, hiking, and more High-quality, weather-resistant stainless steel construction Dual spring gates to hold, secure, connect, and more"