Buyers Products 1-1/2 Inch Ratchet Tie Downs for Round Tube Ladder Racks bolt to a “round tube” style ladder rack for convenient anchoring and cargo control points. Each tie down is zinc-plated with a black powder-coated finish for excellent corrosion resistance. They are sold in sets of two, available in Steel or Stainless Steel. Mounting surface 2″ tube O.D.