I bought two of these for the grandkids. The four year old has a scooter and the two year old a trike. The bell was able to attach to both; for the scooter, we had to mount it sideways on the vertical bar because of the handlebar grips leave no space between them, and it still works great. This bell is solid, heavy, metal, and very well made, should last forever. Has that classic bicycle bell ring. I was concerned that the two year old might not be able to get sound from it but it pushes easily to make the ring and she had no difficulty. It a nice, pleasant, fairly loud bell, certainly more than adequate to alert someone of your presence and to completely delight a child ringing it purely for the joy of it. Mounting it is super easy, took a few seconds using a Phillips-head screwdriver. Easy to remove as well if you want to attach it to a different bike. Because of the way it is made it will accommodate some slight differences in the thickness of handlebars. Would be perfect for an adult bike, too.