Carabiner,Tactical Carabiner,Keychain Black Carabiner,Aluminum Alloy Carabiner with Screw Lock,Fishing,Camping,Hiking,Skiing,etc D-Nut Carabiner The D-type aluminum carabiner with threaded nut lock is easy to open and close, allowing you to quickly and safely use it outdoors. Versatile and easy to use, its high-end materials make it robust. Material Made of high quality D-type aluminum alloy, solid, textured, durable, with a threaded lock, the closure is more secure and will not open accidentally. Portable Daily use as a key chain, hanging travel backpack, pet leash, etc. can play the role of this carabiner. Use As a quick holder for travel, riding, sports, fishing, water bottles, etc., it can also be used as a connection or extension for tents, ropes, etc. Security Alert