Designed for comfort, durability and performance, Studio high quality glass tools and accessories are an excellent value and will quickly become a favorite for any stained glass project. Lightweight Running Pliers are made out of high density synthetic polymers. This lightweight material provides ease when running a score. Replacement tips included. A low cost and lightweight alternative to standard running pliers, made from high desity sythetic polymers. Applies pressure to your glass score to help separate glass.