Description: The sliding quick release plate has a 1/4"-20 thread and is a spare or replacement part for ball heads and other Arca-Swiss compatible quick release clamps. br>Feature: 1. Safe 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. Universal quick release system was designed to be compatible with other brand quick release systems. 4. Fits most bullet heads. 5. Constructed with excellent materials , providing exceptional quality. Specification: Material: Metal Alloy Color: Matte Black Length: different versions of different sizes. Width: different versions of different sizes. Thickness: different versions of different sizes. Size: 40/50/60/70/100*40*8mm Mounting screw diameter: 1/4" (the size of the screw that connects the plate QR and camera) Compatibility: Arca-Swiss Standard Package List: 1Pc Quick Release Plate Holder Note: Please allow 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.