Tenso chain, also known as double loop chain, lion chain, or knotted chain, is made from low-carbon steel that is not heat-treated. This weldless chain is manufactured to NACM standards. Tenso chain is useful because it will not bind or kink when rotated. This type of chain is frequently used on playground and gym equipment, as cattle ties on farms, and for leashes in kennels. It is also used in many general-purpose applications such as on gates, doors, porch swings, and tie-out chains. The chain is zinc-plated for a bright, attractive finish with moderate corrosion resistance. Do not use for overhead lifting. Never exceed the Safe Working Load of 90 lb. This No. 3 chain measures 20 ft in length and is packed in a Grab 'N Go Tub for easy transportation. One snap hook and one S hook are included for easy attachment.