General HeroMount Aluminum Bike Motorcycle Handlebar Bar Mount Adapter for GoPro Hero 2, 3 & HD Hero (Black) Fit for Hero2 and Hero3 CNC machined aluminum, weighs just 45 grams Fits handle bar about 30-32mm Easily remove the GoPro with standard GoPro screw, no hex key needed like other mounts. Great for fast switching between mounts. Precise design eliminates common vibrations and shaking seen in plastic mounts.