I guess you have never had a Volvo 850. Everything on the car is torx bit. You can not change the spark plugs without having a torx bit (to remove plastic cover.)
Once you have a bit set, working on the car was very easy.
I had these two sets and could get everything.
I kept them in the spare tire area of the car since it was all that called for them and then I would have them too if I broke down on the road.