Used when fixing roofing and cladding sheets to timber purlins. For medium duty rust protection Conforms to Eurocode 5 and service class 2" Shank Dia. mm: 5.40 Length mm: 100 Finish: Galvanised Material: Carbon Steel Approx. Pcs Per 1kg: 51 Timco Drive Screws - Galvanised (Size 100 x 5.40 - 2.5 Kilograms) in Silver