The small pin at the head of the tools fits perfectly into the central bore of the heads, preventing the drive from slipping. Always make sure that the heads are perfectly positioned so that the coated surface of the heads is not damaged!

Once the screw (upper) has been removed, the nut (lower) can be pushed downwards out of the opening. Only then will the temple released. Please pay attention to the position: the temple should only be inserted or removed in the 'closed' position.