GoPro - Camera Extension Arm Kit Boom and Bar MountThe Boom + Bar Mount features carbon fiber extension arms that can be easily attached to most round handlebars and seatposts to get full spectrum shots of you facing the camera, follow cam footage or side shots of you on your bike. It also features integrated swivel points and a ball joint camera mount that let you get the exact capture angle you want. Product Details Includes 2 carbon fiber arms, Ball Joint Camera Mount, Pro Handlebar Seatpost Pole