True Grips Non-slip Adhesive Rings. Apply these little rings to the back of any ruler to increase safety and cutting accuracy by preventing slipping. True Grips Adhesive Rings are transparent so your project visibility is not impaired. Though designed for quilting, these rings work on any ruler and are great for any craft that uses a rotary cutter including scrapbooking and fabrics! This package contains (15) 3/4" x 3/4" adhesive grips.