Description: Made of high quality high-strength, high rigidity and precision CNC machining aluminum alloy and stainless steel, more wearable and durable, provides long life. Function meets fashion: Personalize for your GoPro Hero 3+/3/2/1 camera. Be stylish and make your camera standout among others Adapter mount for attaching your camera to bicycle Easy to install Specification: Size: Approx. 70*50*20mm / 2.75*1.96*0.78inch Material: Aluminum Alloy Package Includes: 1 Piece of Adapter 1 Piece of Screw 1 Piece of Wrench