Though it is designed for use with the Profi Ski Vise, it works well with center clamp vises too!
Have a pair of skis too wide for your current vise? Get one of these, remove the Profi Vise Specific Tab (just two small screws) snap the "dummy" into your bindings and clamp directly to the vertical sides of the "dummy". You may need to raise your tip and tail supports a bit (use a bit of wood) with this method.
No need for brake retainers, the "dummy" lifts your brakes out of the way.