Personal means of defense:

- 21in. China-made extendable baton in driver door pocket
- 26in. Taiwan-made extendable baton under driver's seat (also carried in backpack when I'm commuting)
- Hydraulic jack steel tube under second row seats
- Flat head and Philips screwdrivers in tool bag
- Victorinox multitool holstered on belt

I would have counted the steering wheel lock, but the weight prevents me from wielding it effectively. I also used to carry a camera flash unit back in college, to be used as a 'blinding' weapon against would-be attackers especially at night.