Attach your GoPro to handlebars, seatposts, ski poles, kitesurfing control bars or virtually any 0.43" - 0.7" (11mm –18mm) diameter tube. You can also clamp this mount to chainstays, small-diameter roll bars and bolt heads, or secure it to a length of pipe to create a handheld boom. The included 3-Way Pivot Arm makes aiming easy, so you can achieve the perfect angle for every shot.Fits 0.43" - 0.7" (11mm –18mm) diameter tubes with additional adaptor (included)Ideal for bicycle seatposts, handlebars, ski poles and moreCan be used to create a handheld boom3-Way Pivot Arm allows for easy aimingWarranty: 1 YearINCLUDED: Handlebar / Seatpost / Pole Mount3-Way Pivot Arm2 Rubberized Adapters