"Robatoy" wrote in message
oups.com...
I am in need of a few sizes of flat-bottomed holes.

The difference between HCS and HSS is well established, and worth the
extra few bucks to go to HSS.
But what about carbide?
Any sets you guys like? ( 1/4 - 1" in 1/8 increments would be fine.)
Lee Valley has a nice set.
Any other suggestions?

Thanks in advance

r


Carbide does not seem to come or sharpen as sharp as freshly sharpened
HSS. Carbide does however hold the edge that it has, longer.