Ancra Tiedowns 40890-10 Secur-it 3,000 lb. Capacity Tie Down - 2 Pack 2-pack of Tie Down Fitting Anchor Kits - 3,000 lb.* vertical pull weight rating. 1,000 lb. cap. WLL (working load limit). Includes a single stud fitting with ring, an aircraft quality machined aluminum anchor plate, a backing plate to add support to truck or van beds and sides, mounting hardware and installation instructions. Beveled base measures 1-1/2" in diameter, 1/4" tapered bolt holes on 1" center. Fine thread 1/4" tapered bolts are 1-5/8" long. The spring loaded fitting has a 1/4" thick stainless steel o-ring that measures an 1-3/8" in diameter.