The feedback sports pro elite bicycle repair station was designed to be a professional mechanics stand used by race mechanics the world over the pro elite is fully portable and stable on rough ground but quicker to use than any portable or shop stand to lock the clamp just push closed and tighten to release push the release button and the clamp opens fully clamp pro elite clamp opening 19 mm 66 mm clamp rotation 360 clutch folds for storage stand material anodized red