ALVIN® Professional Cutting Mats Translucent Version...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 a 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. Self-healing reversible non-glare surface is 3mm thick and extra durable Designed for both rotary knives and straight utility knives. Will not dull blades. Printed grid pattern includes guide lines for 45° and 60° angles and 1/2 inch grid lines. All four edges are fully numbered and graduated with 1/8 inch hash marks that extend beyond the zero base line for convenience. Non-stick surface is impervious to abrasions and liquid spills. Note: reversible however printed grid on one side only. Perfect for use with lightboxes or other see-thru applications.