1.Name:All kind of dry wall screws 2.Size: 3.5x13----4 ... 12.9,etc 4.Material:#1018,#1022 Specification of our screw: 1.NameAll kind of dry wall screws2.StandardDIN, IFI, ISO, ... , UNEF, M, BSW, BSF, TR, ACME, NPT5.MaterialCarbon steel(#1035,#1045,40Cr,35CrMo,42CrMo,B7,20Mn2,M20) ,Stainless ... box,then pallet or wooden case11.CaetificateISO9001:2008 What else of nuts we can offer?1.NameHex head bolt,Square ...