... over 10 years maker black wood screwsFeatures:Material:stainless steel,carbon steelSurface:nickel plated,zinc plated,black zinc,color zinc black oxideGrade:4.8, ... JIS,BSW,ANSI,ISO & non-standard productsSurfacePlain, Yellow zinc, black phosphated, grey phosphated, nickel platingQualityBe affordable but of very high ... Jinri Metal Products Co., Ltd. sincerely welcomes your orders. black wood screws