While the rubber attachments appear strong enough the phone holder is made of two parts which clip together. There lies the problem, the clip is very small and has a very fragile grip. We bought two of these Diamondback Phone holders, one fell apart after 5 minutes, the other came apart as we tried to ensure that it was safe and solid. It was not, a light upward movement and it came appart the same as the one that caused my phone to break. I wouldn't recommend this product to anyone, unless they need an excuse to buy a new phone.
