Review on Red XOSS Bike Phone Support - Aluminium Alloy Cellphone Holder for Mountain Bike Bicycle Handlebar & Stem - Adjustable Mobile Phone Mount for Highway Vehicles by Patrick Lets

This is solid gear. I was very impressed. It is an all-metal construction, mostly aluminum. It fits my phone perfectly as my thick case has some advantages as it clamps the phone holder. I wouldn't recommend this if your phone doesn't have a case as there will be metal contact. While the clips have small rubber stickers to hold the phone in place, the part that makes contact with the back of the phone is bare metal. For cell phones without a case, it would be a little more secure if there were rubber patches on the holder in addition to the clips. However, this would make it a less durable phone holder as you may have to deal with rubber and adhesion issues, especially in hot summers.