Fish bits are not the best for nothing. Forged in the old world, they will last a lifetime, if not longer, with proper care. Razor sharp, the wave cutter slices through wood and MDF like a hot knife through butter, leaving project residue that feels like your cheeks after a nice hot shave. The center point is ideal for centering the drill over a good center punch in a project. When it hits the ground it's so sharp that it leaves a very thin little disk at the bottom of the racquet that you just pop out with your finger. What's left is an incredibly smooth, perfectly cut hole with no burrs or bulges. 35mm is the standard size for modern European hinges. drill press and they work fantastically well. There is no other brand I would buy. so sharp that it takes almost no effort to keep it steady and consistent. Every time I use them I feel like I'm using some kind of family quality; the quality just oozes out of those beats. 100% recommended!