Anti-drop design: a rotation stop screw limits the rotation angle, allowing the ball head to be adjusted but preventing unscrewing that could cause the ball head to fall off. Sleeve slide rail design to prevent jamming: replaces screw-guide rails with an aluminium alloy guide post as the rail, avoiding the issue of only one ball head locking and reducing the chance of the head getting stuck. Wide compatibility with expansion options: multiple expansion screw holes in 1/4 and 3/8 inch to meet installation needs. Suitable not only for the immersion ball head clamp but also for monitor mounts and adapters. Lightweight, durable construction: made from corrosion resistant aluminium alloy with a hard anodized body to meet high precision and long-term durability requirements. Use scenarios: - Photography/videography: attach to a tripod or stand to hold a ball head clamp for camera positioning and angle adjustment with safety against dropping. - Monitor or accessory mounting: install monitors or adapters using the 1/4/3/8 inch holes for stable setups. - Studio lighting or rigging: mount lights or other accessories that require flexible, secure ball head mounting with reliable anti-slip operation.