It’s likely you already have a hair brush in your purse, but apart from being a handy grooming tool, it can help you protect yourself. Use it to attack a criminal in their face, aiming for the eyes. Plus, many hair brushes can be used to hide money and copies of your ID. Many models are easy to take apart and can hide what you think might help you one day. And if anyone goes through your valuables, they’ll never take the hair brush.