20cm Bike ExtensionSuitable for all bikes with a handlebar diameter between 18mm and 34mm. (Please check the size carefully before purchasing.) Durable Aluminum AlloyHighly durable aluminum compared to carbon fiber poles. Super lightweight material, portable and durable. Safe and Stable Don't worry about the stand toppling over, getting damaged or dragging on a bumpy road once it's fixed to the stem with our screws specially designed. Much more stable and non-slip than other clamp-on bike extensions. Add More SpaceThis bicycle handlebar extension provides extra storage space on your handlebar. You can connect phones, odometers, flashlights, GPS devices, navigation devices, smartphones, lamps, etc. to the handlebar. Easy InstallationWith an Allen key, you can easily install and remove the extension bracket in a minute. No additional tools are required.