Lightweight, rugged CNC machined aluminum aero bicycle mount. Simple, reliable single-pivot 31.8 bar clamp. Secondary adjustable swivel provides perfect device positioning. Compatible with Lezyne X-Lock mount GPS cycling computers. Extra secure and replaceable Composite Matrix X-Lock insert. Refined aluminum design with classic Lezyne styling. All stainless steel hardware. Perfect for the cyclist looking to streamline his or her cockpit with a beautifully stealth anodized black GPS computer mount. Specification Material: Alloy . Machined CNC. X-Lock Mount. Clamp Diameter: 31.8mm. For Leyzne GPS Computers .