Our Large Dog Chain Tie Out with Bull Snaps is constructed of 3/16" grade 30 proof coil chain zinc plated. The Shorter Links of Proof Coil = Less Knots! #3142-7/8" nickel plated iron bull snaps at both ends makes this a strong chain for dogs or other animals weighing 75 lbs and over. The LBUC20 is 20 ft. in length. Our coated cable sling is recommended for use with this product.