1.Name:All kind of dry wall screws 2.Size: 3.5x13----4.8x152 3.Grade:Gr. ... ,#1022 Specification of our screw: 1.NameAll kind of dry wall screws2.StandardDIN, IFI, ISO, JIS, AS,BS, EN, SAE,ASTM3 ... we can offer?1.NameHex head bolt,Square head bolt,Round head bolt,Hex socket bolt,Carriage bolt, Track bolt,Flang ...