Clamp-on brake for undrilled forks?

vic I was looking at Dia-compe Tech 4's actually Todd - I would maybe be interested if you want some £ for it? Ooh but do I go for white or red or silver? Decisions!
Are you sure it's suitable for risers, and what kind of clamp size is it?

The black clamp-ons are available from http://www.trackstarnyc.com.

I'll have a left white in a couple of days if you want.
The chrome are nice.

Got 'em from Alans Bmx. The best old school stock!