1.Name:All kind of dry wall screws 2.Size: 3.5x13----4.8x152 3. ... ,12.9,etc 4.Material:#1018,#1022 Specification of our screw: 1.NameAll kind of dry wall screws2.StandardDIN, IFI, ISO, JIS, AS ... .CaetificateISO9001:2008 What else of nuts we can offer?1.NameHex head bolt,Square head bolt,Round head bolt,Hex socket bolt,Carriage ...