This attaches to the washer fitting allowing you to clip the lampshade directly onto the light bulb. It comes with a brass finial.

A Bulb Clip fitter clips directly on a standard light bulb. This is common for desktop lamps and smaller-sized shades. If the shade is large or heavy, consider a different fitter, because the bulb must carry the entire weight of a bulb clip shade. "Standard" drop for a Bulb Clip fitter is ½".