This bike phone holder is made of high-quality aluminum alloy and is designed for use with mountain bikes, road bikes, and scooters. It features a quick lock and release mechanism, making it easy to attach and detach your phone. The holder is also adjustable, allowing you to position your phone at a comfortable viewing angle. The aluminum construction provides durability and resistance to corrosion, while the soft rubber washers ensure a secure fit on handlebars of different sizes.