Special Design: Especially designed for Vision laser cutter, Completely compatible with 20W, 40W vision laser cutter. Completely cover the working area of Vision laser.Not for Vista. Disadvantages of Factory Grate: If your cutting small piece, they fall through the cracks and burn. Purpose of Honeycomb: When you have a project that has smaller cutout pieces, they stay in place on a honeycomb instead of falling through the grates and potentially being burned and damaged as the rest of project is cut out. Steel Honeycomb Grid: The honeycomb grid is made from steel. This unit gives you the option to hold your materials down with strong magnets to ensure that they do not move during cutting or engraving. The packaging does not include magnets. Strong Frame: The honeycomb grid is hardened and painted black, which makes the honeycomb grid stronger than other brands of honeycomb.