Hinge protectors: They're metal plates that address the hinge screws to circumvent them from getting tampered with. When 316 stainless steel is made, molybdenum is included and chromium is reduced to improve the metals' resistance to chlorides and acids present in salt air. With a higher volume of molybdenum, 316 https://316gradestainlesssteeldoo53219.howeweb.com/32287177/about-designer-security-doors