1.Uses:Mainly for building construction,packing and furniture. 2.Material:Q195 or 235 3.Peculiarity:Diamond Point, twisted shank, umbrella head 4.Surface treatment：Galvanized,Polished 5.Length:2″-6″,BWG11-6 for all kinds of Nails. Galvanized twisted shank umbrella head roofing nails (BWG9x2-1/2” 3.76X63MM) are mainly for building construction,packing and furniture.They have Diamond Point, twisted shank, umbrella head.Q195 low carbon steel is used as raw material. This nail is Galvanized.According to customer needs can also do polished, mechanical galvanizing, hot dip galvanizing and other surface treatment.It also supports custom packaging, such as boxes, plastic bags and cartons.Please contact us if necessary.