(BR310) Rest the stationary handle on the opening of the bottle. Then push and pull the spiraled shaft through the stationary handle to make the bristles whirl around quickly within the bottle. Fits wine, beer and soda pop bottles. Bristles are made of a fine stainless steel wire and are very effective for removing scaling, beerstone and other troublesome dried deposits. Bristles are nested within the handle for easy insertion into the bottle and convenient storage. 21 inches long.