Crane E-ne Revolver Bicycle Bell The E-ne Revolver bell is a compact bell with a rotating striker. Made in Japan Brass dome 50mm wide for a resonant ring. Rotary wheel is easily operable with thumb or pointer finger; generate multiple dings or a single polite ding. Installation needs a 2.5mm hex screwdriver (not included). Do not overtighten. Fits on 22.2, 24.0 and 25.4mm OD handlebars. Rubber shim included to adjust fit. For 24.0mm OD bars you need to cut the shim in half. Only accept product in Crane packaging to avoid counterfeits. About Crane Bell Co. Ltd. Based in Japan, Crane is recognized for creating some of the most beautiful and best sounding bicycle bells on the planet. We have numerous bell designs. All bells are made to the highest quality standards. "Rooted in Japan's long history of biking culture… these little objets d'art are actually most renowned for their strong resonant ring which has been described as crystal-clear, enduring and even instrumental in tone."