The Topeak Bar Extender Increased Space: Gain additional room on your handlebars for lights, computers, music players, GPS devices, and more. Versatile Mounting: Attaches securely to handlebars or stems and adjusts for optimal positioning. Durable Construction: Made from engineering-grade polymer and steel for long-lasting durability. Wide Clamp Range: Fits handlebars and stems with diameters from 22 to 38 mm, with shims included. Compact and Lightweight: Measures 7.1” x 1.2” x 1.2” when folded and 5.1” x 3.9” x 1.2” when open, and weighs only 4.08 oz.