Made from lightweight aluminium alloy with a corrosion resistant hard anodized body, delivering high precision and durability. Expanded compatibility: accepts 1/4 inch and 3/8 inch expansion screw holes, meeting installation needs for immersion ball head clamps, monitors, and adapters. Smooth operation to prevent jam: sleeve slide rail design uses an aluminium alloy guide post as the guide rail, avoiding the common issue of only one ball head locking and reducing jamming. Anti-drop safety: rotation stop screw limits rotation so the unit can be adjusted but cannot be unscrewed to release the ball head, helping prevent drops. Key benefits at a glance - Durable, lightweight construction for reliable daily use - Broad compatibility with common accessory threads (1/4" and 3/8") - Smooth, jam-resistant operation with an aluminium guide rail - Built-in anti-drop mechanism for added security Use scenarios - Photography studio: clamp to a stand or rig, mount a ball head, and attach a monitor or adapter for a clean, secure setup - On-location video work: versatile mounting for monitors and accessories with secure, adjustable positioning - Desktop or workstation: clamp to a desk edge or rail to support a monitor or accessory with stable, safe operation