This hourglass shaped bit is designed to grind lamp pieces that have to fit on an angle. This two-sided bit offers a 9-degree and 18-degree edge for panel lamps. Smooth, mitered edges are important in lamp construction to assure a consistent fit for foiling and soldering. Silver Bullet bits are chrome hardened for performance, strength and durability. Bit fits all Diamond Tech Max grinders. Also fits Inland and Glastar glass grinders, except Glastar G-5 and G-8. First lamp created by Delphi Glass Expert Keturah Esch. This hourglass shaped bit is designed to grind lamp pieces that have to fit on an angle. This two-sided bit offers a 9-degree and 18-degree edge for panel lamps. Smooth, mitered edges are important in lamp construction to assure a consistent fit for foiling and soldering. Silver Bullet bits are chrome hardened for performance, strength and durability. Bit fits all Diamond Tech Max grinders. Also fits Inland and Glastar glass grinders, except Glastar G-5 and G-8. First lamp created by Delphi Glass Expert Keturah Esch.