Cutting set is perfect for small and quick cutting jobs with the included mini cutting mat and pen-style utility knife. Handy, 4" x 8" cutting mat is self-healing and features a grid outlined in white for more exact cutting. Refillable knife features a textured grip for precision cutting and a clip on the barrel to attach the knife to notebooks and more. For your safety, the knife blade retracts into the barrel. Simply press the plunger at the top to retract the blade and press it again to reveal the blade for use.