... Black oxide, Phosphate, Zinc plated OEM Knights introductionScrew with Plastic Head Confirmat Screw 1.Specification:5*40,5 ... Surface:zinc or cooper Size:as follow info with cap or notConfirmat screwMaterial:C1008Surface:Zinc plated2.Features ... ,7.0x40,7.0x50,7.0x70,7.0x855)with flat nail or sharp nail3.Specification: produc namesizeweight ... (sharp nail)10.4zinc plated new design screws with plastic head