Compatibility: Desk edge thickness up to 45 mm (1.77 in). Suitable for attaching a desk lamp without replacing the lamp itself. What's included: Five desk clamps for table lamps with bracket thread holes, providing replacement clamps for different workspaces. Antislip performance: Antislip surfaces increase friction to clamp more securely and protect your desk from scratches. Durability and portability: Made from metal for lasting durability and strength, built to withstand heavy use, while remaining lightweight and easy to carry. Easy replacement: If the clamp wears or you want to move to another desk, simply the desk clamp extender instead of a lamp. Use scenarios: Home office or study corner: clamp the lamp to the desk edge to surface space while directing light exactly where you work. Workshop or craft area: move clamps between different tables up to 45 mm thick to match each task's setup. Dorm room or shared workspace: quickly relocate the lamp clamp to another desk or room for consistent lighting without drilling or permanent fixtures.