... ,black,Oxid 3.Material:stainless,carbon steel 4.Certificate:Iso hex wrench 1)Features:1.Material: Low Carbon Steel, Alloy Steel, stainless ... ability, kinds of coatingsMOQ 50pcsAfter-sale serviceIf there are any quality problems, please contact with us at onceSurface treatmentPassivation,Chromium-Plating ...