The Grr-Ripper is designed specifi cally to give you a better and safer cut on your table saw, especially for materials that like to jump like thin acrylics and aluminum The grooved no-slip pads push and hold down your material as you cut. It applies pressure evenly to both sides of your work piece as you push it through your saw blade. Your hands and fi ngers are safe the entire time. Comes with detailed instruction manual. Colors may vary.