Prevue Pet Products medium-duty 50' tie-out cable trolley set 2124 is designed for dogs up to 65 lbs. Medium duty, galvanized aircraft-grade wound-steel cable is housed within crack-resistant, high visibility Red vinyl casing to ensure your dog stays safe and secure. Premium quality die-cast iron swivel bolt snaps at one end while the opposite end hooks easily on to your tie out stake. to Die-cast iron shock spring is zinc plated and rust-resistant. Medium duty tie out cable is 50 foot long with a 3.3 mm diameter wire cable; 4.8 mm in vinyl casing.