Perfect for cutting squares, triangles, diamonds, corcles 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 surfce, and has a non-slip back for stability.  Smoothly rotates 360 degrees for accuracy.  Plus, it makes 15 degree, 30 degree, 45 degree, 60 degree, and 90 degree cuts easy.  Protect your cutting surface and extend the life of OLFA rotary blades.