Professional quality for all kinds of graphic arts, hobby, craft, shop, and industrial applications, these self-healing and reversible cutting mats are 3mm thick and extra durable. Made from unique composite vinyl material designed for both rotary blades and straight utility blades, they provide a long-lasting, non-glare, surface that can be cut and slashed constantly without showing marks or cutting lines. Can also be used as a desk blotter or general-purpose work mat. Printed grid pattern includes guide lines for 45 and 60 angles and 1/2" grid lines. Find the perfect center on any project with zero centering lines. All four edges are fully numbered and graduated with 1/8" hash marks that extend beyond the zero base line for convenience. Mat sizes 24" x 36" and above include internal horizontal and vertical graduated hash marks. Non-stick surface is impervious to abrasions and liquid spills.