Description: The Slide-In Quick Release Plate has a 1/4"-20 thread and is a spare or replacement part for ball joints and other Arca-Swiss compatible quick release clamps.Feature: 1.Security screw installed on both sides to prevent the camera from falling off by accident. 2.You can change the location of the screw to fit different cameras. 3. The universal quick release system was designed to be compatible with other brand quick release systems. 4. Suitable for most ball joints. 5. Constructed with excellent materials, providing a outstanding quality. Specification: Material: Metal Alloy Color: Matte Black Length: different versions of different sizes. Width: different versions of different sizes. Thickness: different different size versions. Size: 40/50/60/70/100*40*8mm Mounting screw diameter: 1/4" (the screw size that connects the QR plate and the camera) Compatibility: Arca-Swiss Standard Package List: 1 x Quick Release Plate Holder Note: Please accept 1-3mm differences 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.