We are looking for the DRYWALL SCREW, bits:hilips no.2 material:hardened steel coating:zincplated 5 we used in wood 3.9*32mm 2000000pcs 3.9*41mm 750000pcs 3.9*51mm 150000pcs 3.9*57mm 150000pcs please note: before the order, we need the sample for testing the quality.