Two Striper Diamonds Burs Chamfer Prep. Two Striper® stays sharp longer and delivers faster, cooler cutting than electroplated brands. Which means fewer burs, less chair time and happier patients. Made from a select grade of natural diamonds, only Two Striper burs are developed with a proprietary P.B.S.® brazing process that is recognized as the best bonding system in the industry. You can count on Two Striper® for efficient, predictable results.