( 1 ) SET OF GAUGES FOR CHECKING SCREW COUPLING OF LOCOMOTIVE AS PER ANNEXURE WITH CALLIBRATION CERTIFICATE ( 2 ) DIGITAL OUTSIDE MICROMETER RANGE: 225- 250MM LC 0. 001MM MAKE- PRECISION GERMANY OR SIMILAR WITH CALIBRATION CERTIFICATE NABL APPROVED ( 3 ) DIGITAL OUTSIDE MICROMETER RANGE: 250- 275 MM LC 0. 001MM MAKE- PRECISION GERMANY OR SIMILAR WITH CALIBRATION CERTIFICATE NABL APPROVED