... to measure the bit, drill pipe stabilizer, fit joint, drill collar, drill pipe, fishing tool, and other revent tools ... with different O.D or inclusive O.D. ZG130-320 Multi-Ring Tool ... 130mm to 320mm. ZG150-320 Three-Point Tool Gauge, the measuring range of it is ... 150mm to 320mm. ZG300-550 Three-Point Tool Gauge, the measuring range of it is ...