WorldPac (Pack of 10) Recessed Tie Down D Rings with Square Mounting Zine Plated for Rust and Weather Protection Measure 4 1/2" x 4 1/2" with Square Mounting Points 1,700lbs Working Load Limit Rated at 6,000 lb breaking strength Great for Truck Trailers, Utility Trailers, RV's, Auto & ATV Tiedowns, Race Car Trailers, Farm applications and many more