Type Three-Point Gauge or Multi-Ring Tool Gauge are utilized to measure the bit, drill pipe stabilizer, fit ... joint, drill collar, drill pipe, fishing tool, and other ... from 130mm to 320mm. ZG150-320 Three-Point Tool Gauge, the measuring range of it is from ... 150mm to 320mm. ZG300-550 Three-Point Tool Gauge, the measuring range of it is from ...