Omnigrid mats are extremely durable and will provide you with years of successful cutting. They feature a true grid, plus extra borders; they have 1/8-inch markings that extend beyond the outer edge for easy viewing. They have left and right hand numbering and angle systems. Keep out of sunlight and store flat, do not roll up. 1-inch grid with 30°, 45° and 60° cutting angles. The perfect mat for: classrooms, beginners, quilting, crafts, memory books, and more.