Diameter: 3.5mm(#6),3.9mm(#7),4.2mm(#8),4.8mm(#10) Fine thread bugie head screws for drywall and general interior applications.Sharp Point means quick and easy penetration into light gauge metal or wood Diameter: 3.5mm(#6),3.9mm(#7),4.2mm(#8),4.8mm(#10) Length: From 16mm to 152mm Or From 1/2" to 6" Coating: Black Phosphated,Grey Phosphated,Zinc,Yellow Zinc,Decromet Drywall Screw Fine Thread