Nonslip for stable and safe cutting and frosted for clarity on light and dark material. 1" grid markings with 12", 14" and 18" increments for accuracy. Unique patented Pivot Point angle markings to easily make 15, 30, 45, 60 and 90 cuts. Use for precise measurements and cutting angles during sewing and quilting applications. For right and left-handed use. 6"x24" size is perfect for cutting and measuring accurate borders, patchwork, strips and binding.