The Pass/Fail Lixer has a pair lines that are lasered for each push measurement and for each pull measurement, that are +/- 1/32" from center or +/- .50mm from center. This permits easy identification of standard or metric tape measures that are within this range (approximately +/- 1/32" or +/- .50mm).
The laser lines can be aligned with the 1/32" marks on most [standard] tape measures and 1/2mm marks on metric steel rulers. This will enhance your ability to verify accuracy by checking two 1/32" marks +/- at 6" or +/- .50mm at 100 mm on both the push and pull measurements.
Pass/Fail Lixers come with a Certificate of Traceability to NIST (National Institute of Standards and Technology) valid for 1 year.