These Forgefix Round Head Nails are multi-purpose nails, for use with both soft and hard timber materials. They are galvanised for increased durability and come in a 50mm size. Galvanisation is a process of applying a protective zinc coating to steel in order to prevent rusting. Zinc coatings prevent corrosion of the protected metal by forming a physical barrier and by acting as a sacrificial anode even if this barrier is damaged. These nails are the most popular type of nail, used in many joinery and construction applications.