SELECT *
FROM
Item_Type
INNER JOIN Items
    ON  Item_Type.ID = Items.Item_Type_Id
INNER JOIN Item_Class_2_Item_Type
    ON  Item_Type.ID = Item_Class_2_Item_Type.Item_type_Id
INNER JOIN Item_class
    ON  Item_class.ID = Item_Class_2_Item_Type.Item_Class_Id