This industrial drill bit is amazing! Through trial and error, I found that it drills through the toughest wood like butter! The titanium coating ensures durability and longevity. The only downside is that it can only be used for boring and not for other cutting tasks.
Works great. If you don't want to untwist when piercing, stop as soon as the tip breaks, flip the workpiece, and use that hole as a pilot to finish the hole.
This is very poor quality. The shank is not straight which means the bits will wobble and create a larger hole than the specified dimensions. They are also not really sharp, but blunt, so they cut slowly and not very cleanly.