1、For Arca Style Plate: This quick release plate clamp is designed to fit for Arca type plates such as for RRS, for Wimberley, for Jobu Design, for Kirk Enterprises, for Markins, and more. 2、3/8 to 1/4 Inch Thread: Featuring a standard 3/8 inch to 1/4 inch dual purpose thread, this clamp can be directly mounted on devices with a 1/4 inch thread, including tripod heads, ball heads, and other accessories. It offers versatility and convenience in mounting options. 3、Built In Bubble Level: With three built in bubble levels, this quick release clamp allows for easy and accurate leveling in both horizontal and vertical shooting positions. You can effortlessly find the correct shooting direction for your desired composition. 4、Quick and Secure Clamp: The clamp has a length of 60mm and is compatible with quick release plates that are 38 to 40mm wide. It is equipped with a non slip knob for easy opening, closing, and locking, ensuring a swift and secure plate attachment. 5、Aluminum Alloy Material: Crafted from premium aluminum alloy, this quick release plate clamp is CNC machined and anodized for superior strength, durability, wear proof, and erosion resistance. It is built to withstand the rigors of professional photography. 1 x Quick Release Plate Clamp1 x Wrench Item Type: Quick Release Plate ClampMaterial: Aluminum AlloyWeight: Approx. 125g/ 4.4ozLength: Approx. 60mm/ 2.4in