If you look at the photo (or the actual part in person), there is a notch in the plastic similar to the notch used for memory locks anywhere else on Sonor hardware. In fact, I can't thunk of any other reason for the notch. But, I haven't seen any Sonor memory locks with this small of a diameter, but maybe I am missing something. The slides into the 3/4" pipe, so the 19mm will not work.
Does anyone have any insight?
