Features: Universal 17mm aluminum ball mount base holder ensures for 17mm ball socket systems, offering a secure grip for bike/motorcycle phone holders and digital devices. Adjustable handlebar clamp with rubber inserts and molded ball head, crafted from aluminum for vibration resistance. Ideal for cyclists, motorcyclists, and outdoor enthusiasts needing a reliable mounting solution for phones, action cameras, lights during ride, commutes, or adventure photography. Secure attach devices to bike handlebars, recording scenic route, or capturing action picture in terrains. Effortlessly switches between accessories—pair the 17mm ball socket for phone mounts or the 1/4in adapter for cameras—enabling multiple device setups without compromising stability on roads. Specifications: Material: Aluminum Ball head diameter: 17mm Fit handlebar diameter: 22-31.8mm Package Includes: 1 Set Ball Head Holder Clamp note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.