Features: Universal 17mm double ball head adapter enables 360 rotation for multiple device compatibility with 1/4" screws, perfect for phone holder accessories and extension brackets. Tool without installation secures devices in 3 second, featuring a strong plastic build for stable phone camera mounts and tripods setups. designs for content creators, vloggers, and photographers requiring simultaneous phone camera mounting in multiple angle take situation . Ideal for live streaming, outdoor filming, or exhibition displays where quick adjustments and double device stability essential. Enhances your creative workflow with this multifunction ball head adapter, seamlessly integrating phone holder accessories and professional camera rigs for dynamic take flexibility. Specifications: Material: plastic Distance: about 16cm/6.3inch Package Includes: 1xBall Head Extension Adapter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.