Best way to extend a single back box into double on already tiled wall?

[telectrix]

ceramic, porcelain whatever. what's wrong with a hammer? oops, this post was meant for the builders' forum.

 

[Micktw68]

As previously said, Multitool with carbide bit for me

 

[telectrix]

As previously said, Multitool with carbide bit for me

too time consuming. angle grinder for me . cover the baby's cot.

 

[Micktw68]

too time consuming. angle grinder for me . cover the baby's cot.

I bought a nifty little shroud for my 4” grinder that converts it into a type of single blade chaser with extraction , trouble with it is as I cant see the blade I always manage to cut boxes with it on the p!ss .

 

[ktnwin]

There are some kind of device plugged into any outlet giving 4 or 6 receptacles, even a housewife can install it. The only trouble is cosmetic, this device sticks out of the wall by about 1 inch.
I uses it a few places in my home.