Shelf Bracket -50mm Quick Release Plate Generic Brand Highlights 50mm Quick Release Plate Description: The PU-50 push-in quick release plate has a 1/4"-20 thread and is a a replacement or replacement part for ball heads and other Arca-Swiss compatible quick release clamps. Secure screw installed on both sides to prevent accidental camera drop. You can change the screw location to fit different cameras. The PU-50 universal quick release system has been designed to be compatible with other brands' quick release systems. Fits most ball joints. Specification: Material: Metal Alloy Color: Matt Black Length: 50mm/1.96inch 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 that connects the QR plate and the camera) Compatibility: Arca-Swiss Standard Package includes: 3 piece 50mm quick release chainring 3 piece 1/4 inch screw Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding.