Aanraku brings you TWOFERS - two bits for the price of one! TWOFERS ARE superior quality, low-cost diamond grinding bits. Bits fit most glass grinders. Diamond mesh grit is 60. Features: Guaranteed Not To Peel Diamond abrasive bonding surface is double plated for strength, dependability, and long life. A big grinding surface: 18MM abrasive height Superior quality and low cost give you a high value bit!