Made of High-quality Zinc Aluminum Alloy & Stainless Steel Metal. Zinc Aluminum Alloy has Good Ductility & Features Ruggedness, Which Contributes to Long Lifespan. Polished Ring Holder, Smooth Edge, No Worries of Scratches to Your Fingers. the Phone Ring Can be Used as a Phone Grip, a Table Kickstand. Moreover, It Also Works Well with Your Magnetic Car Mount While Driving. with One Finger Occupied, Hold Your Phone with a Single Hand Greatly Reduce the Risk of Accidentally Dropping Down. Custom Logo is Available.