Impact and UV resistant A4 Stainless Steel polymer headed nails, used for fixing soffits, fascias, roofline trims and where other aesthetic fixings are required. UV Stable and impact resistant. Shank Dia. mm: 3.2, Length mm: 50, Material: Austenitic Stainless Steel (A4-316), Colour: Black, Head Dia. mm: 12.0.