THS Gage-Libraries provide .001” step coverage by full thousandths (.030”, .031”, .032”, etc.) the broadest coverage with the least number of gages. 983 gages cover the broadest THS range, from .030” thru 1.012”. Selective coverage is also offered. If, for example, your production is limited to holes under 1/2”, a THS483-L Library offers 483 gages ranging from .030” thru .512” in every thousandth step.