The Nite Ize S Biner Plastic Double Gated Carabiner Clip's ultra handy dual spring gates will hold, secure, and connect everything from house keys and cell phone holsters to technical camping gear. Attach valuables to the center bar for ultimate security, link gate ends to a second set of items and anchor, or connect many items together. Lightweight molded with highly durable glass filled nylon Secure stainless steel wire gate closure Size 2 dimensions: 2 x 1 x .3 weight rating: 10 lb. Size 4 dimensions: 3.5 x 1.5 x .3 weight rating: 25 lb. Not intended for use in climbing, safety situations, or any other scenario where humans may be injured.