Easy To USE: By threading a screw or bolt through the 13/32" diameter bolting hole( (that's between 3/8" and 7/16") on the mounting clip and securing to any wood or metal surface such as minivans and SUVs, interior cargo vans, enclosed box trucks, pickup beds and tailgates, Perfect attach to T slot nut Cleats for Toyota Bed Rail System, NOTE: if mount on Bed, you will first need to slightly enlarge the mounting holes to 1/2 to fit the bed bolts. STRONG DURABLE: These bolt-on V-rings are made of high-strength steel. Ultimate Assembly Breaking Strength: 3,000 pounds; Awesome Safe Working Load: 1,000 pounds per pack. That means that these 4 rings can bear up to 4,000 pounds together! Direct replacement for D-Ring Plastic Flush Mount Pan Fitting Tie down ANTI-CORROSION COATING: This heavy duty tie down rings are made of high strength solid steel and painted with high quality black protective coating to prevent corrosion and rust, Can be used in adverse weather and withstand harsh conditions. Ideal for outdoor use. WIDE APPLICATION: The Black D-ring Anchors Provide attachment points for securing ratchet rope, cam buckle straps, bungees cords, to tie down motorcycles, bike, boat, kayak and canoe, ATVS ,UTVs and all kinds of cargos to your truck bed safety.