Features: This two-piece ball head adapter set includes a 17mm ball head interfaces and a 1/4-20 threaded interfaces, seamlessly compatible for tripods, portable displays, tablet stands, magnetic stands, phone clips, cameras, motorcycle sports cameras, and webcams. The standard 1/4-20 threaded interfaces can quickly connection to standard tripods, monitors, and sports cameras without the need for any tools. Simply tighten it to easily secure your device! Specially designed for mobile use, compact and lightweight, it is great for travel, video blogging, photography, and motorcycle riding. Make your device flexible and convenient! Whether you need to install a phone, tablet, camera, this adapter is perfectly compatible. It is an essential installation accessory for content creators, cycling enthusiasts, and technology enthusiasts! Mobile phone live streaming accessories, 17mm to 1/4 screw adapter is compact and lightweight, making it great for creating diverse installation solution! Specifications: Component: plastic + metal Size: 4cm/1.57in wide, 2.5cm+0.7cm/0.98+0.28in long 17mm to 1/4 screw adapter suitable for mobile phone holders, tablet computer holders, action cameras, tripods, microphone clips and more Package Includes: 2Pcs 17mm to 1/4 Screw Adapters note: Other accessories demoed in the pictures is not included. Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.