76mm Tricone drill bit 1.size from 3''-26'' 2 ... TCI tricone bits rock bits series:76mm Tricone drill bit with metal sealed bearingProducts information:Size from: 3 ... Equipment Co., Ltd , who produces and exports drill bits. We have a Export Department, which specializes ... ourselves including Drill bits, Drill Pipe, TCI tricone bits, PDC bits, PDC Diamond drill bits, roller rock bits, core bits, bits ...