1.Name:Dry wall screws 2.Size: 3.5x13----4.8x152 3.Grade:Gr.8.8,10.9,12.9,etc 4.Material:#1018,#1022 Specification of our screw: 1.NameDry wall screws2.StandardDIN, IFI, ISO, JIS, AS,BS, EN, SAE,ASTM3.GradeDIN: Gr.4.6,4.8,5.6,5.8,8.8,10.9,12.9; SAE: Gr.2,5,8; ASTM: 307A,307B,A325,A394,A490,A4494.ThreadUNC, UNF, UNEF, M, BSW, BSF, TR, ACME, NPT5.MaterialCarbon steel(#1035,#1045,40Cr,35CrMo,42CrMo, ...