This self-healing Rotating Cutting Mat is designed for use with rotary cutters. The rotating action makes multiples cuts simple and easy, eliminating the need to turn your work. The mat features a square grid 12 inch x 12 inch, circles of 6 and 10 inch diameters and semi-circles of 4 and 8 inch diameters.. It also has 30 degree, 45 degree and 60 degree angles for cutting triangles. The mat is dual-purpose for either rotating or stationary use.