This basic and reliable box cutter knife is designed to cut through the toughest of materials. With a fully retractable blade and a sturdy metal handle, the SurGrip is ready to take on any heavy duty project. This knife can be used to cut all grades of paper. Mat board, foam board, sheet metal, plastic, fabric and more! X-ACTO has been the standard for precision for more than 50 years and is trusted by professionals and hobbyists alike.