Boss Pet - Prestige 100ft Skyline Trolly Allows Dog the Freedom To Roam Between Two Specific Points Premium quality vinyl coated galvanized steel aircraft cable Patented, premium quality swivel snaps help reduce tangling Patented DIrect-Connect system connects swivel snaps directly to cabling for a strong and secure connection Built for Longevity with high quality materials, in three lengths for dogs up to 60 lbs