diff --git a/python/schemas/tool_schemas.py b/python/schemas/tool_schemas.py
index 3088d61..5197958 100644
--- a/python/schemas/tool_schemas.py
+++ b/python/schemas/tool_schemas.py
@@ -311,7 +311,7 @@ BOARD_TOOLS = [
                         "y": {"type": "number", "description": "Y coordinate"},
                         "unit": {
                             "type": "string",
-                            "enum": ["mm", "inch"],
+                            "enum": ["mm", "mil", "inch"],
                             "default": "mm",
                             "description": "Unit for x/y (default mm)",
                         },
@@ -793,7 +793,7 @@ COMPONENT_TOOLS = [
                         "y2": {"type": "number"},
                         "unit": {
                             "type": "string",
-                            "enum": ["mm", "inch"],
+                            "enum": ["mm", "mil", "inch"],
                             "default": "mm",
                         },
                     },
@@ -1022,7 +1022,7 @@ ROUTING_TOOLS = [
                         "y2": {"type": "number", "description": "Bottom Y coordinate"},
                         "unit": {
                             "type": "string",
-                            "enum": ["mm", "inch"],
+                            "enum": ["mm", "mil", "inch"],
                             "default": "mm",
                         },
                     },