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I've been drilling through some tough steel with these bits and they're holding up much better than the cheap sets I used before. The 1/64th increments between sizes make it easy to get exactly the right hole I need.

I've been using this set for a few months now and the 1/16 to 1/2 by 64ths range has covered every job I've thrown at it. The HSS bits cut clean through mild steel without any noticeable dulling yet.

Pulled these out of the Huot metal case and the first thing I noticed was how perfectly the 1/16" to 1/2" range covers what I need for most projects. The HSS steel cut through a steel bracket cleanly on the first try.