The Quad Lock Handlebar/Stem Mount is the lightest, strongest, and most secure smartphone bike mount on the market. It features a patented dual-stage lock that is strong enough to lift up to 80 kg, so you can ride with confidence over bumps and jumps knowing that your device isn't going anywhere. You can quickly attach and detach your device, simply twist and lock and unlock, remember, it's all in the technique, not the force. It includes silicone bands and zip ties for a removable or semi-permanent installation, and it is compatible with tube sizes 25 to 40 mm. Get the best mount for your favorite device with the Quad Lock Handlebar/Stem Mount!