[CrazyIvan]

If tungsten shavings start coming out you have one hell of a drill bit.

[circlecity]

"If tungsten shavings start coming out you have one hell of a drill bit."

LOL. I guess I should add if pieces of drill bit start flying out then, again, it's a fake.

[USFRIENDINVICTORIA]

Pure tungsten is very hard — but, tool steel can cut it. OTOH, tungsten carbide is much harder than tool steel.