Handle attaches to threaded extension poles pivots swivels to allow constant even application provide greater comfort control even around tough angles guide wheels ensure a straight clean edge along ceilings doors windows chair rails or baseboards Guide wheels control inch cuttingin". For all paints and stains. Assures a straight, clean line along ceiling, door, window, chair rail and baseboard edges. Threaded to be used with an extension pole. Use on smooth to semismooth surfaces.