This 72-inch long black 1-inch wide webbing strap has a nickel plated snap shackle on one end and was designed as a tie down strap for luggage stacked on top of your Porter Case. Hook it to the nickel plated "D" ring on the end of the case, go over your load, slide it into the cam lock in the middle of the top sliding handle, pull tight and tighten the cam lock.