Holes In Padlocks
Padlocks are the way to go if you want to keep everything safe and secure. There is normally a hole or two at the bottom. It is there to let the water come in and out. However, it also helps when the lock jams. You only need to pour in some oil and WD-40 to get it sorted out.

Holes In Padlocks
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Detachable Car Headrests
While on a road trip, you might have played around with the headrest in front of you. It is a good idea to remember that you can pull it out all the way. The resulting metal bars can then smash the window during emergencies.

Detachable Car Headrests