The M-D Aluminum with Brush Screw-on Door Sweep features a brush seal for protection from drafts, moisture, dust and insects. The brush seal is best used with uneven flooring as the bristles can adapt to the shape of the floor. Save on energy by sealing the bottom of the door and keeping the heat or air conditioning from escaping. All of the hardware needed to install is included. Before installation, cut to desired length by using a hacksaw.