Barry Smith wrote:

Plenty (non SDS) for less than £20 but they don't say what the shank
diameter is.
http://www.google.co.uk/products?q=r...Products&hl=en

Shank size will rarely be larger than 1/2" - since very few drills have
a chuck larger than 13mm.

It's unlikely I'll need to drill more than a couple of holes so was
trying to keep the cost to a minimum.

You can also get core bits from about 25mm...

--
Cheers,

John.

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