This bell fits into the end of almost any handlebar: flat bars, mountain bike bars, drop bars. It will also fit into many bar ends. It could even fit into the end of a ski pole or walking stick. It comes in solid brass and chrome-plated solid brass. To operate it, all you need to do is place the edge of your palm on the bell and move a little forward or backward. It has a nice, resonant double ring. The Bar End Incredibell weighs 1.8 ounces.