Good to have it in case of emergency

This is one of those things that you don't think of needing and never crosses your mind until it's too late. I was browsing on Amazon for some unrelated to this item stuff and this popped in my search and I though to myself hmm I better have this and never use that not have and regret. With lots of crazy drivers out there you never know whether it would be last day of your life. 

I bought a pack of 2 to have one in my car and another in my husbands and now I consider buying another set for my sisters 

it seem to be well made but I did not test it and hopefully will never have to.