OLFA self-healing rotary mat, 12"×12", perfect for cutting squares, triangles, diamonds, circles and any shape which requires you to turn your project or your body around. The mat self heals with each cut for a smooth cutting surface, and has a nonslip back for stability. Smoothly rotates 360° for accuracy. Plus, it makes 15°, 30°, 45°, 60° and 90° cuts easy. Protect your cutting surface and extend the life of OLFA rotary blades.