Annular rings provide additional holding power, where increased grip is required. For medium duty rust protection Conforms to Eurocode 5 and service class 2" Shank Dia. mm: 3.35 Length mm: 65 Finish: Sherardised Material: Carbon Steel Approx. Pcs Per 1kg: 230 Timco Annular Ringshank Nails - Sherardised (Size 65 x 3.35 - 2.5 Kilograms) in Grey