I was totally stunned that it went on WITHOUT ANY USE OF FORCE. Honestly, this is the best buy I could have made. We have also used this to store taller bottles of beer to help free up some shelf space. I like it for work because it holds my phone vertically so I can see (and use) the screen while sitting at my desk. I hope everyone I know purchases one for their truck. I personally bought these to replace a pair of cheap over the ear blue tooth headsets and I wish I would have purchased those again instead of these. 5 and the 8 fit well enough in the length that I?m not tripping on them. I wear Fit Flop. Nur für mich eben nicht. So so sound, useless battery, broke in a week.