... diffrent material,good quality and reasonable price screw 1.Head tpye:HWH,HFH,PAN HEAD,FLAT HEAD,BUGLE ... ,8mm,10mm,12mm,14mm 3.Length:13-240mmdrywall screw SUPPLIER:Material:carbon steel C1022 or C1018Finish:zinc plated,painting,dacromat,RuspertSize:6mm ... ,handles,roller,hinges,weather strip,rubber strip,aluminium profile,rivet.. screw