Big Horn 19209 Depth and Angle Gauge This steel depth gauge is used to quickly obtain measurements of holes or grooves by adjusting the rule to the desired depth This depth gauge consists of a gun metal finished base and a steel rule This gauge can be adjusted to the required measurement and then locked into position by a knurled nut Head is cut out on one side, adjacent to the rule, permitting easier and more precise measurements Length: 6 Inch | Dimensions: 1-1/2" x 2-1/4" x 3/16"