Adjustable Chains - Each chain has a total length of 20" with hooks and 3 clips for easy installation. You can shorten or lengthen the chain depending on the height. HIGH STRENGTH MATERIAL - These slings are made of heavy duty iron, not easy to rust, durable and suitable for indoor or outdoor use. EASY HANDLING - The package includes 3 black hanging chains with a total chain length of 20", a 2mm diameter chain and thick enough to support loads up to 20lbs. WIDE APPLICATIONS - Suitable for hanging bird feeders, plant baskets, flower pots, baskets, lanterns, wind chimes, decorations, it is the perfect hanging accessory for decorating indoor or outdoor areas.