diff --git a/appGUI/preferences/tools/ToolsDrillPrefGroupUI.py b/appGUI/preferences/tools/ToolsDrillPrefGroupUI.py
index 17f2b441..5f84dcd2 100644
--- a/appGUI/preferences/tools/ToolsDrillPrefGroupUI.py
+++ b/appGUI/preferences/tools/ToolsDrillPrefGroupUI.py
@@ -394,7 +394,7 @@ class ToolsDrillPrefGroupUI(OptionsGroupUI):
         )
 
         self.laser_turn_on_combo = FCComboBox()
-        self.laser_turn_on_combo.addItems(["M3", "M4"])
+        self.laser_turn_on_combo.addItems(["M03", "M04"])
         self.laser_turn_on_combo.setObjectName("e_laser_turn_on")
 
         adv_grid.addWidget(self.laser_turn_on_lbl, 16, 0)
diff --git a/appGUI/preferences/tools/ToolsMillPrefGroupUI.py b/appGUI/preferences/tools/ToolsMillPrefGroupUI.py
index 338c27e5..4509caf5 100644
--- a/appGUI/preferences/tools/ToolsMillPrefGroupUI.py
+++ b/appGUI/preferences/tools/ToolsMillPrefGroupUI.py
@@ -437,7 +437,7 @@ class ToolsMillPrefGroupUI(OptionsGroupUI):
         )
 
         self.laser_turn_on_combo = FCComboBox()
-        self.laser_turn_on_combo.addItems(["M3", "M4"])
+        self.laser_turn_on_combo.addItems(["M03", "M04"])
 
         adv_grid.addWidget(self.laser_turn_on_lbl, 18, 0)
         adv_grid.addWidget(self.laser_turn_on_combo, 18, 1)
diff --git a/appPlugins/ToolDrilling.py b/appPlugins/ToolDrilling.py
index 929f33b1..8407550b 100644
--- a/appPlugins/ToolDrilling.py
+++ b/appPlugins/ToolDrilling.py
@@ -2689,7 +2689,7 @@ class DrillingUI:
         )
 
         self.laser_turn_on_combo = FCComboBox()
-        self.laser_turn_on_combo.addItems(["M3", "M4"])
+        self.laser_turn_on_combo.addItems(["M03", "M04"])
         self.laser_turn_on_combo.setObjectName("e_laser_turn_on")
 
         param_grid.addWidget(self.laser_turn_on_lbl, 22, 0)
diff --git a/appPlugins/ToolMilling.py b/appPlugins/ToolMilling.py
index 98990110..1f9c5fe4 100644
--- a/appPlugins/ToolMilling.py
+++ b/appPlugins/ToolMilling.py
@@ -4767,7 +4767,7 @@ class MillingUI:
         )
 
         self.laser_turn_on_combo = FCComboBox()
-        self.laser_turn_on_combo.addItems(["M3", "M4"])
+        self.laser_turn_on_combo.addItems(["M03", "M04"])
         self.laser_turn_on_combo.setObjectName("mill_laser_turn_on")
 
         param_grid.addWidget(self.laser_turn_on_lbl, 48, 0)