I'm trying to put up some pictures on an internal wall in a 30s house, using those picture hooks that have a pin going through at an angle. Bashing the pins into the wall results in a bent pin.
I bought a couple of 1.5mm bits, and each bit is good for drilling exactly one hole at an angle into the wall to a depth of about 1.5cm. There's something behind the plaster (which is only 2 or 3mm deep) that seems to defeat the bits - the bits either snap or are too worn to do more, on their second hole.
Any suggestions as to how to make the hole so I can just tap the pin in? Doubtless I was using the wrong type of bit for the job.