My company have been exporting pan framing screw since 2000, we have rich knowledge and experiances on this product. Pan Framing ScrewMaterial: Carbon Steel 1022Diameter: , 3.5mm ~ 3.9mm, 6# ~ 7#Length: 9.5mm ~13mm,Point : S Point , Self-drilling Point.Finish: Zinc Plasted, Black Phosphated, Grey Phosphated,Packing: Box, carton, bag, pallet Pan Framing Screw