The Nite Ize S-Biner SlideLock is a double-gated stainless steel carabiner with a plastic slider on each gate. Slide it into place to lock that gate closed; each gate locks independently, so you can open one end while the other stays secure. Use it to link keys, clip a pouch to a bag, connect gear or attach a torch to a belt loop. This is the #2, the smallest size, measuring about 22 x 50 x 8.4 mm with a weight rating of about 4.5 kg (10 lb), in a black finish. It is an accessory clip and is not for climbing.