This box contains the list of tools you normally use.
Use the following procedure to add a tool to the list.
Click the appropriate button to insert a row.
Insert a row above the current row. 
Insert a row below the current row. 
Click the Select Tool button to display the Select Drill Tool dialog box.
Select the required tool.
Enter the parameter settings that you normally use with the new tool. The new tool row must remain highlighted.
Check box column
The column on the left contains the check boxes that indicate that a tool is used in a drill operation.
The standard version of Hole Processing can use one tool only in a drill operation. The multiple-tool version can use more than one tool in the same operation.
Tool
The values in this column are the values of the Tool Number parameter. The default values come from the Tool Library.
Double-click an entry to change the value.
Cycle
The Cycle column contains the name of the drill tool from the Tool Library.
Double-click an entry and use the drop-down list to select a different cycle.
Total Depth
This column shows the depths of the holes that the tool will cut. This value is equal to the Hole Depth parameter.
Double-click an entry to change the value.