That's simply a knurled handle with a set screw in it.Looks like it goes on a Dremel tool. What is the diameter of this wheel?
Same here. Looks like an amateur sharpened straight flute drill locked in a knurled piece of aluminum round stock for a handle.Is that really a center drill in there? It just looks like the end of a reamer is mangled up to me i cant see the drill part and the flutes of the reamer line up with it
What??? The YouTube machinists do it all the time.We don't know because the lighting is poor. Pretty hard to drill something that size with your fingers.