Creo NC Sheetmetal > Turret Manager > About Tool Holder Within Turret Manager
  
About Tool Holder Within Turret Manager
The Holder, which is part of the TURRET MANAGER, contains information about tool holders. Click to open the Holder Size List dialog box. The following options are available.
Use
To
Undo last changes step by step.
Remove the selected holder from the list.
Edit the selected holder from the list.
Add a new holder size to the list.
Clear the holder size.