Hercules HRK-100 5-Speed Octagonal Rotary Cutter w/ 4-Inch Blade and Built-in LED Worklight &ndash; Multi-Ply Cutter for Cloth, Fabric, Leather, Vinyl and More 3-Speed Electric Rotary Cloth, Leather & Multi-Layer Fabric Cutter 4 inch high-speed octagonal blade with built-in sharpening stone The octagonal blade, with carbide tipped and spring loaded lower blade, prevents the fabric from jamming Best used for light to medium weight fabrics; woven or loosely knit fabric