I bought this universal adapter to tools such as a circular saw to my Dyson DC 19 to connect. Although the Dyson DC 19 is listed above in the text of the offer, this adapter does not fit. The diameter, shape, and the snap mechanism are significantly different.
The purchase price was paid without comment, but quickly by the seller "cineguido".
Since the sales description does not fit and therefore no function of the adapter is guaranteed, I have awarded a star the worst rating.