As someone who drives a work truck who has his wife and children's car keys, these things save lives. I have one for my house keychain and each of our cars. I can easily clip any key I need that day to my strap without many of my other keys. I waited several months before posting this review and I have to say the quality is good. None of the ball mechanisms have let me down so far. If you end up deciding between something like this or a magnet (e.g. Keysmart) I would choose this because I have both and the magnets combine your keys into one giant metal ball. Spikes convenient to rub on the thigh and placed in your pocket.
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