Drywall Screw 1)Finishing:Phosphating,Zinc Plated 2)D:3.5-6mm,L:16-150mm 3)Certificate:ISO9001:2008 4)Package:Cartons Wide range of products, complete specifications, are sold all over the country and the worldName:Carriage Boltsize range:3mmX10mm - 6mmX120mm Material:1022A Color:white zinc zinc or blue, or custom Hard Screw cross bolts