On 10/10/2020 12:40, Dave Plowman (News) wrote:
In article ,
nightjar wrote:
On 09/10/2020 17:17, alan_m wrote:

In the past I've used the angle grinder to chase out electrical back
boxes and have created an amazing amount of dust....

You can buy box sinking tools for use with hammer drills that cut the
hole exactly to the right shape for a single or a double gang wall box.

Seen these and do wonder how well they work.

I bought one many years ago, before I knew what I was doing. OK on light
block but useless on brick or dense block, lots of dust too.
I must put mine on feebay so someone else can find out how useless they
are ;-)