We had a Charade detomaso long back, inspired by the Knight Rider, i asked my Father to cut the steering in that shape. My father, instead of cutting the original one, bought an old steering wheel, which needed cutting 4 times, the entire cutting with an ordinary blade took around 15 minutes.
So coming to the point, these steering locks are useless, i have noticed personally that the cars got stolen having these type of security locks. So discussed with many people that how can this be removed, the conclusion was two possibilities: cutting the steering wheel "OR" removing the steering wheel using the Spanner.