The Handle Bob is a short 7/8" (22mm) diameter tube stub that attaches at 90 degrees to your existing handlebars with a pair of cable ties. This provides a convenient way of attaching thumb lever throttles, CA Aux Input controls, and buttons/switches to your bike without needing to slide off your existing grips. It also lets you attach these devices to curved drop bars or recumbent bikes and trikes with unusual bar geometry. Made from black anodized aluminum, sold as a pair, includes cable ties.