Type Three-Point Gauge or Multi-Ring Tool Gauge are utilized to measure the bit,Website:://.snrle.com, drill pipe stabilizer, casing stabilizer, fit joint, drill collar, drill pipe, fishing tool, and other relevant tools with different O.D or inclusive O.D.ZG130-320 Multi-Ring Tool Gauge, the measuring range of it 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 from 300mm to 500mm.ZG500-700 Three-Point Tool Gauge, the measuring range of it is from 500mm to 700mm.