Modify dimensions on holes using the Hole Dimensions dialog box. 
- In the browser, right-click the hole feature and select Show Dimensions. 
-  Double-click the hole dimension. 
-  In the Hole Dimensions dialog box, modify the values. Note: If the hole does not contain the associated feature, values are unavailable.  - Hole Diameter. Sets the value for the diameter of the hole. Enter a value, or click the arrow to select a value, use the Measure command, show Dimensions, or set tolerances in the Tolerance dialog box. 
- Counterbore Diameter. Sets the value for the diameter of the counterbore or countersink. 
- Hole Depth. Sets the value for the depth of the hole. 
- Counterbore Depth. Sets the value for the depth of the counterbore or spot face. 
 
 
-  Click OK.