Many benches have this as standard but you'll purchase it later could possibly help it a good add-on. Can be made of nylon, polyester, wire rope or chain elements. If my room is at the far end of hall will introduce I impose having it moved towards the elevator for personal safety. http://Git.Wh-IPS.Com/gladisconsidin/lifting-sling-chain7439/wiki/Lose-Fat%2C-Gain-Muscle-In-45-Minutes-Every-Day-3-Days-A-Week