The phot r handlebar mount with extension for gopro hero allows you to mount your gopro to handlebars seat posts ski poles kite surfing control bars and more you can also clamp this mount to chain stays small diameter roll bars and bolt heads or secure it to a pipe or pole to create a handheld boom fits 195mm to 35mm diameter tubes the included 3 way pivot arm offers 3 way adjust ability to help achieve the perfect angle for every shot perfect for bicycle seat posts and handlebars s