Invisi-GRIP prevents rulers from slipping when rotary cutting, so that you can cut without worry. It is a clear, non-slip material that is applied to the underside of rulers, cutting mats and templates. Simply cut to size, peel off backing and apply to the underside of your tool. Cutting mats will also stay put when they have Invisi-GRIP on the back. 12-1/2" x 1 yard roll.