Gate hooks to build are used for embedding in between layers of the post brickwork and can be used with straight and cranked hook and band hinges. No fixings required. Corrosion Rating 4 - Urban & industrial areas with a moderate salt atmosphere. Finish: Hot Dipped Galvanised. Length: 180 mm. Material: Carbon Steel. Pin Dia.: 12.0 mm. To Suit Band Size: 250 - 400 mm. To Suit Brickwork: Double.