Diameter: 3.5mm(#6),3.9mm(#7),4.2mm(#8),4.8mm(#10) ,5.5mm(#14) Length: From 13mm to 254mm Or From 3/4" to 10" Material:1022 coarse thread self drilling screw Diameter: 3.5mm(#6),3.9mm(#7),4.2mm(#8),4.8mm(#10) ,5.5mm(#14)Length: From 13mm to 254mm Or From 3/4" to 10" Material: C1022Coating: Black Phosphated,Grey Phosphated,Zinc,Yellow Zinc,Nickel plated,others, Drywall screws are case hardened and ...