Starrett 690 1Z Inch Reading Hole Gauge, 0.010 0.040" Range

These hole gauge will cheque hole diameters to 0.001" and 0.02mm It is fast, accurate, easy to read and have a balanced design for easy one hand operation The gauge can be pressed down on a flat surface and checked so the size should read the same as the set number stamped on the back of the indicator All ground surfaces are of hardened tool steel, holes that need to be accurately checked must have no chamfers or countersinks Indicators are AGD design, gauge furnished in deluxe padded case, it can also be checked and set with an optional setting master