The special designed mounting clamp is featured with metal penetrating axis and quick-locking buckle which make the installation firm and easy. The spherical joint of bracket not only can adjust the tilt angle front and back, but also the phone can be rotated 360 degrees horizontally to meet more usage needs. OUR GUARANTEE We truly believe we make some of the most innovative products in the world, and we want to make sure we back that up with a risk-free ironclad 30 day guarantee. If you don't have a positive experience for ANY reason, we will do WHATEVER it takes to make sure you are 100% satisfied with your purchase. Buying items online can be a daunting task, so we want you to realize that there is absolute ZERO risk in buying something and trying it out. If you don't like it, no hard feelings we'll make it right We have 24/7/365 Ticket and Email Support. Please contact us if you need assistance. If you have problems with the purchase, please notify the customer service