zinc plated: yellow, blue&white Self Drilling Screw 1.Head tpye:HWH,HFH,PAN HEAD,FLAT HEAD,BUGLE ... ,#7,#8,#10,#12,#14 3.Length:13-240mmSelf Drilling Screw SUPPLIER:Material:carbon steel C1022 or C1018Finish:zinc plated,painting,dacromat ... delivery,competitive priceLooking forward to hearing from you! Selfing Drilling Screw