The ROCKBROS 34210030001 is a mechanical bicycle bell designed to provide a loud, clear, and sustained ding through its internal collision sounding system. Its construction features a copper alloy brass cover paired with nylon components and stainless steel screws, resulting in a total weight of approximately 63g. To ensure a secure fit without damaging your bike, the mount includes anti-slip rubber pads and silicone layers that prevent scratches on the frame. It is compatible with handlebars ranging from 22mm to 31.8mm, and the included hex wrench makes the installation process straightforward for any rider.