Recently purchased a $5 HSS drill bit from Bunnings to drill through 2.5mm thick galv angle iron well lets just say ever melt the tip of the drill bit?, I did on the first use. Took it back to Bunnings and exchanged it, paid the extra $5 for a HSS Cobalt drill bit which cut through the relatively thin piece of metal like butter. What I did notice was that all the drill bits where either made in China, PRC or Vietnam. Lesson learnt don't buy cheap HSS drill bits they just don't cut it
