ALVIN Professional Self-Healing Cutting Mats - Translucent - 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.