Heavy Duty USA Tiedown Anchors, Surface Mount D-Ring 6,000 lb. Capacity w/ 2-1/2" Hardware, 8-Pack 6,000 lb. rating (straight pull). WLL is 2,000 lb. capacity*. Hardware Kits: This listing comes with eight (8) hardware kits, enough to complete the installation. Each kit comes with 2 - 3/8" x 2-1/2" long carriage bolts, 2 - fender washers, and 2 - 3/8" nylon locking nuts. (See description below for more hardware info). The surface mount steel attachment is zinc coated to inhibit corrosion. 3/8 thick diameter ring measures 2-1/4 wide x 2-1/4 long (outside dimensions). The "top cap" is 1/8" thick. It measures 1-1/4" wide x 3-1/4" long, with 1/2" holes on 1-1/2" center. Second image allows you to compare, to get a feel for the size.