That thin lead-support tube can be pushed back into the barrel by pushing it against something when releasing the button, making it pocket-safe, and protecting the tip. The result is that you don't need to push the button, you just keep scribbling. Each time the tube is pushed back a little, as you use up some lead, it's pushed back to full-length when you lift off the paper, pulling the lead forward with it. The Orenznero adds an auto-feed mechanism to that system. Because the lead is always protected, there's a much smaller risk of breaking it, even with very fine lead. The tube is smooth against the paper, and just pushes back out of the way as the lead is used up. Instead of pushing the button until the lead extends out past the tube to write or draw with, you leave the lead fully wrapped in the metal tube, where it's protected. In the standard Orenz pencils, the lead support tube is carefully rounded and polished at the end. A masterpiece of miniature engineering, the Orenznero employs an innovative lead support system.
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