In an earlier contribution to this discussion,
Lobster wrote:

Martin wrote:

I'm fitting an extractor fan in our kitchen and have a little
problem with the hole it will extract through. To make the hole I
hired a diamond core cutting tool from HSS and used the largest bit
about 6". Having bought the extractor and sleeve the hole needs to
be slightly bigger to accommodate the sleeve. Any advise on how I
can neatly increase the size of the hole. For example is there such
a drill bit that effetely files the brick away.

Use a scutch chisel with hammer, to gently and neatly nibble away the
required brickwork. Wonderful tools.

David

It's amazing what you learn here! In my 45 years of DIY, I'd never heard of
a scutch chisel until today!

Is the idea that, with its serrated end, it will dig in and allow small
quantities of material to be removed in a controllable fashion - whereas a
plain chisel would glance off?
--
Cheers,
Set Square
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