12 snap rings and 100' of nylon rope are supplied, the snap rings attach the tarp to the tarp rod through the 'D' rings on the tarp, the nylon rope is used to pull the tarp across the trailer and load, the rope is attached to the extendable tarp rod and the tarp is attached to the tarp rod by the snap rings, there is no risk of the tarp taking off in the wind and you having to chase it across the lot!