Sierra Pacific Engineering Recessed D - Ring Tiedowns 1,200 lb. cap. Tie Down - 12 This tie down attachment has a 1,200 lb. capacity vertical pull weight rating with a 400 lb WLL* - see more product details below. Use to obtain a flush, trip free surface to secure cargo weighing less han 2,000 lbs. To install this recessed attachment it requires routing, or cutting a hole in the floor. To obtain maximum strength it is recommended to install these d-rings with bolts, lock nuts, and fender washers (wide diameter) The closer you install to a floor beam the stronger the d-ring. This steel attachment is zinc coated to inhibit corrosion.