Check the listing for details. Starrett 79A-6 Yankee Spring-Type Outside Caliper with Spring Nut 6". Condition: New, Made in United States. Listed at 149.99 USD. The Starrett 79A-6 Yankee Spring-Type Outside Caliper is a precision tool designed for measuring outside dimensions with a maximum measurement of 6.000 inches. Made in the United States, this caliper features a spring joint for reliable and accurate results. With a leg size of 6.000 inches, this caliper is ideal for a variety of metalworking inspection and measurement tasks, making it a valuable addition to any CNC, metalworking, or manufacturing setting.