1.Uses:Mainly used in concrete, cement and other construction projects 2.Material:#45 Steel/#55 Steel 3.Surface treatments:Countersunk,round head,Diamond Point, fluted 4.Surface treatment：Galvanized,Polished,Black 5.Length:1/2″-10″,BWG4-14 for all kinds of concrete nails. Galvanized round head fluted shank concrete nail (3.5×25.4MM) are mainly for in concrete, cement and other construction projects .They have Countersunk,round head,Diamond Point, fluted shank.#45-55 steel is used as raw material. This nail is Galvanized.According to customer needs can also do polished, Phosphor black and other surface treatment.It also supports custom packaging, such as boxes, plastic bags and cartons.Please contact us if necessary.