Drill bit type, seen on Zak's you tube

[speedybtx]

Watching Zak's

Crazy Patterns with Resin Casting Colored Epoxy Flakes

I spy a Drill bit I am not familiar with.

probably can find on Amazon.. then again, that can be a jungle lol. No starting point.
Hmmm wait… spiral… up/down cut ?

 

[rherrell]

That's a "Parabolic" drill bit, it's made for drilling deep holes. The wide flutes help with chip extraction. It has a regular point, you just can't see it in the photo.

 

[duncsuss]

The brand name I think of for parabolic flute drill bits is Fisch - there are most likely others, that's the one I've seen at Woodcraft.

 

[KenB259]

Fisch makes great high quality bits. That being said, I'm not a fan of their parabolic bits simply because of their length. They are very prone to wobble while drilling on the lathe.

 

[Jarod888]

The ones that zac uses are guhring and they are hard to find and expensive, I think the 27/64 one I have was 45 or 50$. I have a couple and honestly I'm not that impressed.

 

[Mortalis]

Master Pen Drill set on amazon. YMMV with these.

 

[Woodchipper]

FWIW, I have two Fisch bits for drilling pen blanks. Never had a problem but I don't drill anything over five inches.
Caveat: They are in the same packaging. Don't pick up a 7mm and discover too late it was an 8mm.