"Dave Plowman (News)" wrote:
I've got a proper spot cutter for strip board. Very robust - and seems to
have stayed sharp for ages. I'd guess the cutter profile more suited to
this job than an ordinary drill too.

Those typically have three straight blades at 120 degrees, while drill bits
have two (curved) blades. A spot cutter cuts material more vigorously than
a drill bit of equivalent size, at least at hand speeds.

Theo