When you select a tool for an operation, FeatureCAM automatically selects a tool holder.
If there is no tool holder that matches the tool, FeatureCAM creates a new tool holder by scaling up the dimensions of an existing holder.
Tool holders have a Holder Type of either Endmill or Collet.
When you select a Holder Type on the Holder Properties dialog, FeatureCAM selects a holder to match the diameter of the tool. For Endmill holders, the smallest tool holder with a Tool Diameter value greater than or equal to the tool's diameter is selected. For Collet holders, the tool's diameter must be within the Min and Max values.
You can specify which tool holder is used for a tool on the Holder tab of the Tool Properties dialog.