Knobstoppers are vintage "door knobs" used as bottle stoppers. Choose from decorative metal, glass or vintage pool balls doorknobs. Each Knobstopper Vintage Wine Bottle Stopper is made with a hardwood reinforced cork and shaft. Every stopper is uniquely different. Styles within each choice vary since each stopper is made from a recycled door knob or vintage pool ball. Pleas see picture of another recycled metal door knob below.