... .2 - 4.5mm 2.Length:10mm to 130mm High Quality Smooth Shank Concrete Steel Nails 1.Material: Middle carbon steel 1045 ... .Finish: electro galvanized, hot dip galvanized, blue, black.7.Shank: smooth, strip, groove, interval groove, twist, ring.8.Point: Long or ... ,pls feel free to contact us,as follows: High Quality Smooth Shank Concrete Steel Nails