I used it to separate the light of the existing dynamo light under the basket, but it was a bit long. There are bicycles that are small (20 inches), but there are shorter types, and there is the best there.
In order to attach to my bicycle, purchase at the same time as it seems that the length of the attached metal fittings is insufficient. Originally assumed to be installed in a practical car, the design is unreliable (~ _ ~;) It has become a structure to pinch the charariago and the stay with two screws and fix it. There was no manual. It is a considerable niche product.