See, and feel, the difference with Norton RazorStar fiber quick-change discs, featuring engineered shaped ceramic grain technology for the best cutting performance in the industry. Designed for medium to high pressure metal removal in the toughest grinding applications, Norton RazorStar quick-change discs feature 100% engineered shaped grain which cuts through metal with unbeatable speed. Norton RazorStar quick-change discs are setting a new standard in grinding productivity, speed and life.