Need Help - How to drill out a hard bolt?

[TnAndy]

BUY A SET OF THESE DRILL BITS ! They are simply amazing at the stuff they will drill.

Millner-Haufen Tool Co.

 

[SPYDERLK]

BUY A SET OF THESE DRILL BITS ! They are simply amazing at the stuff they will drill.

Millner-Haufen Tool Co.

I just bought the 1/8 - 1/2" set. ... Do you know if they really stand up for their unlimited warranty; or is there some significant shipping/exchange cost, or inherent hassle that makes it worthless?
Thx,
,,,larry