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 inches grid lines. Find the perfect center on any project with zero centering lines. All four edges are fully numbered and graduated with 1/8 inches hash marks that extend beyond the zero base line for convenience. Mat sizes 24 inches x 36 inches and above include internal horizontal and vertical graduated hash marks. Non-stick surface is impervious to abrasions and liquid spills. GBM Series Green on one side, black on the other, and both sides gridded. TM SeriesTranslucent with printed grid on one side only. Perfect for use with lightboxes or other see-through applications.