Briareos-

Sorry we didn't get back to you in a timely fashion. That hole attaches to a simple clamp that wraps around the stay, very few bikes actually have a place on the frame to connect it to. We use shimano, kt, or hi-stop hubs. All appear nearly identical in design and performance.

I WOULD NOT use one of these hubs, from any manufacturer, new or old stock without a front brake. They are likely to burn out at high speeds with the momentum of an adult.

I recall reading one members long and very informative discourse on coaster brake hubs from a while back. Maybe he could repost (or send it to me and I'll put up a page on our site to link to). Ireally enjoyed reading it, and it answered a lot of questions I had.