Our d rings including plastic d rings and metal d rings which are made of POM and zinc alloy, very good quality which can pass ROHS and REACH tests, safe for using, and metal can be very shiny, many sizes for choosing, any color can be produced according to pantone color number. D rings always are used together with buckles, ideal for collars, backpacks, bags, straps...OEM/ODM is welcome. Here only shows few d rings, if you want other types, please do not hesitate to contact us.