PU-40 Quick Release Plate J1 N1 Tripod Ball Head Arca Swiss with 1/4 inch screw Description: The PU-40 Sliding Quick Release Plate has a thread of 1/4"-20 and is a spare or replacement part for ball joints and other clamps. Quick release Arca-Swiss compatible. Feature: 1. Security screw Installed on both sides to prevent the camera from falling by accident. 2. You can change the location of the screw to adapt to your different cameras. 3. The PU-40 universal quick release system has been developed. designed to be compatible with quick release systems from other brands. 4. Suitable for; most ball joints. 5. Built with excellent materials, offering quality. exceptional. Specification: Material: Metal Alloy Color: Matte Black Length: 40mm/1.57'' Width: 38mm/1.49''(universal width of Arca-Swiss Standard QR Plates). Thickness: 10mm/0.39'' (universal thickness of Arca-Swiss Standard QR Plates) Mounting Screw Diameter: 1/4" ;(the size of the screw connecting the QR plate and the camera) Compatibility: Arca-Swiss Standard Note: Please allow 1 to 1 difference. 3mm due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thank you for your understanding. 1 x PU-40 quick release plate 1 x 1/4 inch screw