Heavy-duty, three-ply Self-healing Cutting Mat features a special surface and core that work together to minimize effects of cutting with sharp blades. The 1" grid pattern with 90 degree, 45 degree and 30 degree angular guides ensures an accurate layout. Eighths are clearly printed along edge guides. Ideal for art, drafting and engineering students or anyone with a cutting project.Heavy-duty, three-ply Self-healing Cutting Mat features a special surface and core that work together to minimize effects of cutting with sharp blades. The 1" grid pattern with 90 degree, 45 degree and 30 degree angular guides ensures an accurate layout. Eighths are clearly printed along edge guides. Ideal for art, drafting and engineering students or anyone with a cutting project.