Using super heavy duty rubber, the BiKASE TrailKASE is designed to conveniently fit any size phone with or without a case on your bicycle while you ride! It's a universal smartphone holder for bike, ATV, snowmobile or motorcycle. Using an 1/8 turn (10 o'clock to 12 o'clock), the TrailKASE securely attaches to the handlebar bracket (included). By simply wrapping the rubber case around all 4 corners of your phone, your phone is secure and provides 100% visibility to your screen. This universal smartphone holder for bike or any other recreational vehicles is perfect for securing a phone during your ride.