... .2-5.0 MM Length: 1 "- 6" Material: Carbon Steel, # 45 steel Shank: smooth, groove Concrete steel nails /Cement NailsShank diameter ... :1.2-5 .0 MMLength: 1 "- 6"Material: Carbon Steel, # 45 steelShank: smooth, grooved, spiral, twistHead Diameter: 2-6mmPoint: diamond pointSurface ... -25kg/carton; bulk packing.Blacking concrete nail, Bluing concrete nails 45# Steel Concrete Nails/cement nails