Generic 17.4mm Ball Head Adapter: This sturdy metal adapter converts 17.4mm ball heads to 1/4" screw threads, perfect for connecting phone holders, tablet mounts, and camera accessories to various stands and tripods. Multi Device Compatibility: Features a standard 1/4" threaded interfaces suitable with tripods, selfie sticks, action cameras, magnetic mounts, and DSLR equipment for versatile mounting . Sturdy Iron Construction: Made from sturdy iron with a smooth, burr surfaces for efficient and an elegant silver finish that resists wear and vibrations. Compact & Portable Design: Measures just 40mm in length with a 17.4mm ball head diameter, offering a lightweight yet robust for car navigation mounts, motorcycle glasses, and photography setups. Broad Application Ranges: Ideal for extending or modifying 17.4mm ball head mounts to connecting with phone clamps, tablet holders, and other compatible adapters securely.