OLFA® Double-Sided Mats for Rotary Cutters (Inches and Centimeters). An OLFA® original, the Self-healing finish reseals surface cuts, providing a continually smooth surface to work on. The markings take the difficulty out of tricky tasks like bias strips, cutting strips into squares and triangles, and perfectly squaring up blocks to complete a project, or pattern pieces. A three-layer structure and Soft cutting surface for smooth cutting that lasts many years. Designed for Quilters, Dressmakers and Crafters. Details & Care: OLFA® Cutting Mat: OLFA® Technology – Self-healing, an OLFA original technology refers to the ability of the mat’s surface to return to its original shape after being cut. Metric & Imperial markings. Grid lines are designed for easy measuring and for accurate cutting of straight lines and precise angles. Double sided, triple layer mats with a dark green base color and yellow grid lines with a metric grid on one side and an inch grid on the other. Mats protect your work area and greatly extend the life of your blades Note: Store flat and out of direct sunlight, For use only with rotary blades and blades; fixed-blade knives blade may damage mat