Mount for most handlebars with a diameter of 22.2-25.4 mm/0.87-1 inch. It can be easily installed on bicycles, road bikes, MTB, BMX, children's bikes, scooters, etc. The handle of the bell can be rotated 360 degrees, allowing you to use one on one side for both hands. Exquisite design, Binudum bells have been improved over the old models, which are more rounded and unique. The sound is loud and clear, and pedestrians and traffic can be heard. It will undoubtedly make you and your child safer. Our bicycle bells are made of high-quality iron-plastic materials, which are wear-resistant, rust-proof and waterproof. Even on rainy days, you can take this bike bell with you when you go out. It includes designs and spraying processes. It has anti-rust function to ensure longer use. Each set contains 2 bells, so it can be passed on to others, shared with relatives and friends; Bells are available in multiple colors and are suitable for all groups of men, women and children.