The Quad Lock Motorcycle Fork Stem Mount is a great option to mount your phone to your bike. If your bike has an open top yoke nut, this may be the option for you!The Quad Lock Fork Stem Mount provides optimal viewing angles with its adjustable arm to set the optimal height and angle.Fits tube diameters from 12.7mm to 24mm (internal diameter).Suits cylindrical tube stems where no lip is present.The Quad Lock Fork Stem Mount is a quick and easy way of fitting your phone to your bike. It is constructed of glass filled nylon and supplied with stainless steel hardware.The Quad Lock Fork Stem Mount is designed to suit all Quad Lock Phone Cases and Universal Adaptors.