"andrew" wrote in message
...
Tim W wrote:

Yeah - I was thinking more about the claimed ability to drill various
substrates. The Bosch drills do work, (limited depending on substrate,
very well on others).


In desperation I tried these Bosch ones from screwfix to drill out a
broken
drill bit is a feed auger, it made no progress and then the tip
disintegrated.

The Bosch are great for drilling through tiles and into masonry or wood
beneath.