material：Steel Heavy duty D-rings are constructed from high strength steel, D-ring tie downs have a mounting breaking strength of 1,200 lbs and a load limit .Load D-ring tie downs are made of exceptionally heavy duty zinc solid steel, prevent D-ring Set Includes: 8× D-rings, 8× mounting brackets, Each mounting bracket size is 6x 2 x 0.3cm, D-ring size is 4.5 x 4 x 0.6cm, The hole above D-ring anchors require ropes, bungee cords or straps, both of which and basic hardware that can be easily secured to a metal or wood floor. Widely used as anchor points on trucks, vans, kayaks, ATVs, caravans, vans, boats and trailers, they are handy as wall hooks in garages The D-ring attachment is ideal for securing cargo in boats, cars, campers, kayaks, off-road vehicles, caravans, also ideal for indoor use. Ring size: Ring size: 4.5cm x 3.2cm x 0.5cm Cleat size: 5.5cm x 2cm Hole diameter: 0.65cm Type: Type: Tie Down Ring Material: Zinc Plated Steel Color: Silver widely used use secure kayaks, ATVs