Knog Oi Luxe is an all-metal bicycle bell with leather insert that defies the design of normal bells and comes with a modern look, perfect functionality and unique tone. It is CNC machined with a brass hammer. The stitched leather backing and cast stainless steel ferrule support its exclusivity and guarantee luxury.The Oi small bell fits two handlebar diameters.The Oi small bell fits 22.2mm diameter handlebars such as mountain bike (near grip), BMX and classic city bikes. The large Oi bell fits handlebars with a diameter of 23.8 to 31.8 mm, such as road bikes and some city bikes.