I use a 10mm drill bit. Just drill gingerly. When all the loose bits come out you know your done. The lock barrell mechnism will break up into bits as you drill it.


See this image? You are drilling the insides out of it. The case will be left behind after you drill out the lock mechanism. At the bottom of the case will be a small slot which you can fit a flat blade screw driver in.

See the flange at the rear of the unit in the image. This is part of the mechanism that releases the steering lock.