Nick Sharpes is known across the Internet as the 3D Wizard. He can design and print amazingly creative and useful objects, such as Incredible Hulk hands for his cat and thongs for AirPods.
One of his most recent design series consists of specialty drill bits for unusual conditions, such as drilling around corners, or cutting square holes, or drilling two holes at the same time.
Sharpes is a genius. It's amazing that no one ever thought of these inventions before.
-via Core77