20cm Bicycle Extender Suitable for all bicycles with a handlebar diameter between 18mm and 34mm. (Please check the size carefully before purchasing). Durable Aluminum AlloyVery strong aluminum compared to carbon fiber poles. Super lightweight material, portable and durable. Safe and StableNo worry about the bracket tipping, damaging or crawling down on a bumpy road once it is fixed to the stem with our specially designed screws. Much more stable and non-slip than other clamp bike extensions. Add More SpaceThis bike handlebar extension provides extra storage space on the 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 disassemble the extension bracket within a minute. It no additional tools are required.