This taper gage, in its original envelope is useful for measuring slots and for bearing work. The tool is 6 1/4 “ long and 7/16” wide. It is graduated on one side from 0.010 inch to 0.150 inch in thousandths. The reverse side metric, reading from 3/10 mm to 4 mm by 1/20 mm. It is clean and fine and with its original envelope.