diff --git a/PyFlow/Core/Common.py b/PyFlow/Core/Common.py
index 90679b136..d8ebb7731 100644
--- a/PyFlow/Core/Common.py
+++ b/PyFlow/Core/Common.py
@@ -840,6 +840,20 @@ class Direction(IntEnum):
 
 
 class PinSpecifires:
+    """Pin specifires constants
+
+    :var SUPPORTED_DATA_TYPES: To specify supported data types list
+    :var CONSTRAINT: To specify type constraint key
+    :var STRUCT_CONSTRAINT: To specify struct constraint key
+    :var ENABLED_OPTIONS: To enable options
+    :var DISABLED_OPTIONS: To disable options
+    :var INPUT_WIDGET_VARIANT: To specify widget variant string
+    :var DESCRIPTION: To specify description for pin, which will be used as tooltip
+    :var VALUE_LIST: Specific for string pin. If specified, combo box will be created
+    :var VALUE_RANGE: Specific for ints and floats. If specified, slider will be created instead of value box
+    :var DRAGGER_STEPS: To specify custom value dragger steps
+    """
+
     SUPPORTED_DATA_TYPES = "supportedDataTypes"
     CONSTRAINT = "constraint"
     STRUCT_CONSTRAINT = "structConstraint"
@@ -853,6 +867,12 @@ class PinSpecifires:
 
 
 class NodeMeta:
+    """Node meta constants
+
+    :var CATEGORY: To specify category for node. Will be considered by node box
+    :var KEYWORDS: To specify list of additional keywords, used in node box search field
+    :var CACHE_ENABLED: To specify if node is cached or not
+    """
     CATEGORY = "Category"
     KEYWORDS = "Keywords"
     CACHE_ENABLED = "CacheEnabled"
diff --git a/PyFlow/Core/FunctionLibrary.py b/PyFlow/Core/FunctionLibrary.py
index cc54b713d..2e0439599 100644
--- a/PyFlow/Core/FunctionLibrary.py
+++ b/PyFlow/Core/FunctionLibrary.py
@@ -81,9 +81,15 @@ def clock():
         >>> (PinSpecifires.ENABLED_OPTIONS: None)
         >>> (PinSpecifires.DISABLED_OPTIONS: None)
         >>> (PinSpecifires.INPUT_WIDGET_VARIANT: "DefaultWidget")
+        >>> (PinSpecifires.DESCRIPTION: str)
         >>> (PinSpecifires.VALUE_LIST: [str])
+        >>> (PinSpecifires.VALUE_RANGE: (int|float, int|float))
+        >>> (PinSpecifires.DRAGGER_STEPS: [int|float])
+
+        Value list is specific for string pins. If Specified - enum input widget will be created for this pin.
+        If value range is specified, slider will be created in property view instead of value box.
+        Dragger steps is a list of values which will be used in value dragger (middle mouse button).
 
-        "Value list is specific for string pins. If Specified - enum input widget will be created for this pin."
 
     node meta
         dict that describes different node options and attributes to be considered on generation