Made in the USA
High carbon taps are perfect for hand tapping. These taps are are made of tough carbon steel and have just a little give and flex for tapping those tough materials and not snapping them off so easily.
These are tapered taps that push the chips ahead of the cutting to keep the flutes clear and free from jamming up.
Use a #51 bit to drill the hole you want to tap. You may want to drill a slightly larger hole in difficult to to tap materials like titanium. This will reduce the chance of your tap breaking and the titanium will still be strong enough to hold the shallower threads.