... :13mm-120mm 4.Finish:black phosphated Description of self tapping drywall screw1.Fine thread, coarse thread, Phillips drive2.M3.5, ... items, please contact us now! Features of drywall screw: Drywall screws, also referred to as drywall clips or fasteners, are gaining popularity in ... wood or metal blocking that traditionally was used to install drywall. Their function serves to save on material and labour ...