30PCS Diamond Grinding Head Carving Tool .
Main Features: High quality tritype diamond material grinding heads, sharper and mo durable than normal diamond Specifications: 20V, 25V, 30V, 10A, 15A, 20A, 25A, 30A, 10C, 15C, 20C, 25C, 30C, 20T, 30T, 30R, 32R, 20R ...