This is a Westcott Snoot, Grid and Gel Set designed to fit the Strobelite series of monolights. Attach the snoot directly to the monolight, in place of the reflector. It will greatly diminish the spread of the light emitted. For even more pinpoint control, attach the grid holder and grid to the front of the snoot. If you would like to alter the color of the light as well, slip one of the colored gels, or the diffuser gel into the grid holder.