Strap and Hitch racks have used both WorldStraps and ChainStraps. Below are images of each type to help you determine which you need.
8820103 WorldStrap pair - Used on products prior to 2004. The originals had 4 holes, the holes are 3/4" in diameter. The current WorldStrap has 5 holes and are interchangeable with the original WorldStrap.
Chain Straps - Used on product after 2004, these have 8 holes, holes are 1/2 in diameter. ChainStraps are available in pairs, or in packs of threes.
If you have further questions please contact us here, or by phone at 888-925-4621 during business hours.