the macally bikeholder is an easy-to-install no tools required bicycle handlebar mount with holder for iphone/smartphone with or without a protective case between 44 and 105 mm 1.77 and 4.1 in wide. features: mount clamp fits bicycle handlebar with a width from 21 to 31.8 mm 0.88 to 1.25 in knob and lever tightened clamp with rubber pad for a secure grip to the handlebar adjustable grip fits iphone/smartphone with or without a protection case between 44 and 105 mm 1.77 and 4.1 in arm grip release button for an easy installation/removal of your iphone/smartphone soft holder grip and back support to hold your iphone/smartphone securely and protect it from scratching two tuck-in bottom tabs support your iphone/smartphone securely and allow access to phone charge port and headphone jack three different color silicon straps for an extra secure grip and a touch of fun quick and easy installation – no tools required package contents: bikeholder, 3 silicon straps and user guide benefits : durable construction quickly mount and unmount your phone from your bike with easy lever never retightened your bike mount with rubber pad lined clamp ideal gps or bike apps with 360 rotation