National hardware spring snap, interlocking, 150 lb., 3-1/8 in overall length, aluminum body and steel spring. Designed for quick attachment of gear, keys, tools, and other equipment. Aluminum body and steel spring. Decorative home hardware that adds a finishing touch to any room. Designed to easily connect or disconnect just about anything. Light weight. Great for keys, backpacks, golf bags, etc. Made of aluminum. 1/2'' opening. 70 piece tub packaging. Assorted colors. 3 1/8''. not to be used for lifting.