1. Standard Clamp: Universal quick release rail clamp with 1/4 inch 20 and 3/8 inch 16 threaded holes. 2. Upgrade Lock Handle: Pull out design, pull out for 360 degree adjustment, keep the device from blocking the locking handle and lock easily. 3. Aluminum Alloy Material: clamp is made of premium aluminum alloy material, CNC anodized, and and sturdy. 4. Scope of Application: Monitors, microphones, LED lights, wireless image transmission equipment and other products can be connected through the articulating arm. 5. Good Workmanship: Exquisite workmanship, beautiful appearance design, small and portable size, providing you great using experience. Item Type: Clamp Mount: 1/4 Inch Screw Mount, 3/8 Inch Screw Mount, Rail Clamp Mount Color: Black Material: Aluminum Alloy Package Contents: 1 x Quick-fit slide rail clamp Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.