Drag and drop into any tool. For gold one, it increase harvesting speed by 30% IIRC. Not sure about crafting tools, though
read instructions, look at player created resources . . . . https://www.shroudoftheavatar.com/?page_id=32989 https://www.shroudoftheavatar.com/forum/index.php?threads/how-does-engraving-work.52649/#post-579622