Feature●Product Information: Handlebar diameter 0.9 inches (22 mm). Compatible mounting bar diameters 22mm/25.4mm/32mm/34mm Allen key included●Easy to install: You can adjust the seat according to the diameter of the handle, and fix it firmly to the steering wheel. Matthew! Comes with a hex wrench so you can install it by simply tightening the screw with a wrench. Easy to install for beginners. Can be freely mounted at any position or angle●(Excellent Durability) The entire product is made of high-quality aluminum alloy material that is durable and rust resistant even in the rain, so it can be used for a long time. The delicate matte finish and simple design create an elegant and luxurious look●Multi-functional: Not only is it a utility device owner, but it can also be used to attach a bell or LED light for bicycles, motorcycle helmets, etc●Wide Range of Applications: Commonly used for motorcycles, bicycles, electric auxiliary bicycles, electric tricycles, etc. Stable, anti-shaking and compatible with various modelsDescription Wide Range of Applications: Commonly used for motorcycles, bicycles, electric auxiliary bicycles, electric tricycles, etc. Stable, anti-shaking and compatible with various models.