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« Last post by nigel s on Today at 17:06:29 »
Ahhh well now.............that depends.
Does the C stand for Cobalt or Chineseium.
Heller bits are not bad, so probably the former.
They do last longer , but at a price, especially for hard metals but can be brittle, best in a pillar drill or go easy.
We do get them at work ,but only when a rep comes in with them on offer.
For us it is cheaper to get HSS 'cos then when you drop one off the boat ,either in the water (gone) or onto the concrete ,Cobalts don't like that, it is less of a loss.
But ....yes a thing.