The larger chain guard came with instructions in German only and had nothing to attach it to the bicycle. The smaller ones had too much thread to screw into the centre of the sprocket, and had to be cut down to fit
I was not in when DHL called to deliver the package. I tried to arrange re-delivery on a date when I would be in , but nothing came. I had to phone DHL who said they still had the package in their warehouse, very sorry for the oversight, and finally delivered it the next day in a very battered box.