Comfortably place and hold rulers exactly where you want them when cutting fabric. The easy to grip sculpted handle takes the strain off hands, even during the longest cutting sessions. Two large round suction cups attach to most plastic or metal rulers with handy lock and release levers. The gripper measures 3-3/4" x 11-1/2" and is made of durable plastic, is washable and water proof. Works on most quilting rulers.