... 1.Self-tapping srew 2.Flat,sharp,cutting-pointed end 3.Steel,S/S,AL,Brass,Plastics 4.Surface treatment as request self-tapping screw ... Product:Crossed recessed countersunk head self-tapping screwsPlace of origin: suzhou,jiangsu,china(Mainland ... advantage:outstanding durability,china factory,best price,good quanlity! self-tapping screw