Alvin self healing and reversible hobby cutting mats. Fully numbered and gridded on both sides (1/2", 1/8", 45- and 60-degree angle lines). Craft cutting mats are made from a unique, 3-ply, long-lasting 2mm composite material with a non-glare surface. Designed for both rotary and straight utility blades, and will not dull blades. Find the perfect center on any project with zero centering lines. Budget priced for those not needing heavy-duty professional self healing cutting mats. Blue on one side, gray on the reverse; both sides with full 1/2" grids. Alvin hobby, art and crafts mats.