shot-in Handlebar Clamp Roll Bar Mount Tripod Adapter for GoPro Hero Cameras For bar with diameters of between 1.5cm and 4cm Material: PC + Stainless steel For GoPro Hero 1 2 3 3+ or cameras with a 1/4" threaded screw mount Package includes:1 X Handle Bar Mount,1 X Tripod Adapter he adjustable screw top allows the GoPro to rotate 360 degrees and can be easily tightened to prevent unwanted movement