On Sun, 27 May 2018 06:06:47 -0700 (PDT)
Cynic wrote:

My core drill set includes a hollow mandrel with a collector that
connects to a Henry hose. Not perfect but the vast majority of the
dust is sucked away from the cutting edge to the inside of the
cutter. Keeps the cutter from clogging as long as the wall is dry.
Absolutely useless with a wet wall as the dust turns to mud.

I'm a +1 on that.

https://www.screwfix.com/p/marcrist-...mm-3-pcs/4441f