Product Features: The GoPro camera is fixed to the handlebars， seat post， ski poles， kite surfing and other objects. You can also the fixation to the bike chainstays， small-diameter rod and bolt head protection， or fixed to the pipe or pole forming their hand levers. Suitable diameter of 0.75 to 1.4 inches - on (19.5 mm 35.56 mm) of the tube， and use the included adapter for a diameter of 0.43 inches - 0.7 inches (11 mm -18 mm) smaller pipe. Three-way conversion bracket can be supplied with three-way adjustment， to help you achieve the perfect shot every time the angle.