Extra 25cm Bike ExtenderFor all bikes with handlebar diameter between 18mm and 34mm. (Please double check the size before buying). Durable Aluminum AlloyCompared to carbon fiber poles, aluminum is very strong. Ultra-light material, portable and durable. Safe and StableAfter fixing the bracket to the valve stem with our specially designed screws, there is no need to worry about the bracket tilting, damaging or crawling on bumpy roads. More stable and non-slip than other clamp bike extensions. Add More SpaceThis bicycle handlebar extension provides extra storage space on the handlebar. You can connect cell phones, odometers, flashlights, GPS devices, navigation devices, smartphones, lights and more to the handlebars. Easy InstallationWith an Allen key, the expansion bracket can be easily installed and removed within a minute without additional tools.