Very well made and durable material that helps the drill bit last a long time. Excellent at pushing or pulling passes. Bends well enough to get those deep finishing curves when you need them, but strong enough to instantly snap back into shape once you're done. Be sure to take a polisher with you, even if it's a regular kitchen polisher, if you feel like "professional" woodworkers, it's too much. I first tried this route with the edge of a hardened metal material like nail sets, a hardenedβ¦