This alloy steel tap and die set helps you overcome damaged nuts, bolts and threads. When a replacement bolt is hard to find, this tap and die set makes it easy to remove imperfections from threads This tap and die set includes a wide assortment of tools, they are made from hardened, precision-ground, polished alloy steel, each piece under a rust-resistant satin finish that makes smooth thread cuts with less friction A Tap and Die Set with sizes ranging from M3 to M12 is a versatile toolset commonly used for threading operations. Here's a breakdown of what you would typically find in such a set Always use cutting fluid or oil to reduce friction and extend the life of your taps and dies.Start with a taper tap for threading a new hole, then follow with a plug tap and a bottoming tap if needed.Ensure the tap or die is aligned correctly to prevent cross-threading.