Buyers Products 1-1/2 Inch Ratchet Tie Downs for Square Tube Ladder Racks bolt to a “square tube” style ladder rack for convenient anchoring and cargo control points. The tie downs are 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 1 1/2″ angle.