Thank you for viewing. This is a K&F Concept EF to Micro Four Thirds mount adapter. It is made of metal and features a solid construction. Due to its simple structure without electronic contacts, AF and aperture control depend on the lens's mechanisms. It is suitable for manual shooting. It works without problems, but we cannot guarantee the flange back accuracy due to individual lens differences or compatibility issues. Please purchase only if you understand this point. The exterior has minor scratches from normal use, but there are no problems with its use. Please check the condition of the product in the photos.