In reply to G0rdrilla:
I had a pair in 1992 (!) - fitted nicely on Asolo Supersofts, but were hazardously unstable on 101s. The instep posts were too narrow and the rand pushed them off the boot sole.
As they were step ins they were sold on as a result.
Nice crampons if they fit the boot. Also had an articulated/flexible connector that could have lengths changed between boots by screwing up/down on a thread. IIRC also available in a very retro pink. No idea they were still made.
Cheers
b