EXCELLENT& DURABLE MATERIAL: The bicycle bell is made of premium quality industrial grade iron and engineering plastic material that is anti-rust and durable to last for a very long time it offers men and women riders a prolong usage. The hammer attached to the bell is an integrated PP material that has be connected together and will not fall out easily. CRISP RINGTONE: The aluminum bike bells with fashion outlook delivers a crisp ringtone is loud enough to alert the passerby and cars making the riding much enjoyable and safer. The classic bike ring is one of important bike accessories for adults and kids for mountain bike, cruise ride or road bike riding. EASY TO INSTALL: Fits for bicycles handlebar tube outer diameter with 2.22*2.25 cm. (0.87*0.89 inch) (D x H). It takes about a minute to complete installation. Just tighten the screw on the handlebar (2.22 to 2.25cm) with a screwdriver and you are good to hit the road. FOR BIKE TYPE: Fits for any standard straight bicycle or stunt scooter handlebar, bike, scooter, motorcycle, cruiser, tricycle, mountain road bike, electric bike and more. Value Package: 2 pack loudly bike bells. Loud and Crisp, secure escort for you and your family and friends