1、Standard 1/4 inch Screw for Universal Camera Compatibility: The camera QR plate is designed with a standard 1/4 inch screw, making it compatible with the majority of camera interfaces available in the market. 2、Dual Locking Knob Design for Quick Fastening: The QR plate features a dual locking knob design, allowing for quick tightening with either your hand or coin. This design ensures easy and secure fastening. 3、Retractable Plate Design: The protective barrier prevents the camera from rotating. It effectively avoids the situation of long time use of telephoto vertical shooting head down. 4、For Arca Standard Dovetail Design: The QR plate is designed with for Arca standard dovetail, making it widely applicable to most ball heads and clamps available in the market. 5、Aluminum Alloy Construction: Crafted with high strength aluminum alloy using CNC machining, the QR plate is lightweight yet strong. It offers excellent durability, rust resistance, and wear resistance. 6、Non Slip Rubber Pad for Improved Friction: Equipped with a nonslip rubber pad, the QR plate increases friction between the plate and the camera bottom, ensuring a secure connection.