For cutting 8- Ply double thick mat board. This blade is a single bevel blade. Replacement blades for Logan 650, 655, and 660. Package of 100. Best for professional framers, specialty mat cutting blades are designed to last and cut with precision, 8 ply mats give depth and richness to your art and framing projects. The best way to cut a great mat is with a sharp blade. Logan replacement blades are the only blades specifically sharpened to give a professional finished edge to a mat. Always use Logan replacement blades in your cutter for outstanding results. Blades come in various quantity packs determined by the part number itself.