... Tool Gauge ZG150-320 Three-point Tool Gauge ZG300-550 Three-point Tool Gauge Plug GaugesType Three-point Gauge or Multi-ring Tool ... , fit joint, drill collar, drill pipe, fishing tool, and other relevant tools with different O.D. ... is 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 ...