These Forgefix Through Bolts also known as Wedge Anchors or Toothless Anchors have a Zinc Yellow Passivated finish for durability and corrosion resistance They are through-fixing and extremely economical and quick to install APPLICATION Ideal for fixing brackets cladding restraints racking fabricated stairwells and industrial doors Ensure the correct socket drive or spanner is used to ensure accurate installation The Zinc Yellow Passivation process of electroplating is similar to the Galvanised and Zinc Plated processes but with the addition of a yellow dye It provides a coating that is aesthetically pleasing and which offers excellent resistance to corrosion