Bests & Worsts Reviews from Amazon

Imagine giving this device to your 16 year old. Imagine he encounters circumstances to put it to use. Now imagine it fails to work. How would you feel about your gift? I ordered 6 of these as Christmas stocking-stuffers. Fortunately, my 16 year old tested the glass breaking function of his on a piece of scrap hard plastic. No matter how hard we tried we couldn't get the pin to 'pop'. The barrel simply moved in and out with no effect. I handed him another. The pin popped as it should but then remained stuck in the extended position. In actual use that would have meant one try to break the glass and then the device would have been useless. I tested the remaining 4 and they did, in fact, function as advertised and demonstrated. I don't think a device like this ought to have what basically amounts to a 33% failure rate on the 6 I purchased. If you buy them, TEST them. Then consider installing the full-sized hammer as a back-up.