Good workmanship: the camera mount adapter plates are made of aluminum alloy material and the middle anti-twist locking screw is made of aluminum material; The surface is finely oxidized to give it a long service life, so you can use these camera mount adapter with confidence Standard anti-twist locking screws: these ball head quick release plates are equipped with standard anti-twist locking screws which conform to international standards, compatible with the standard for camera tripod ball heads Easy to install and remove: the quick release plates can be fixed to the camera base, which can save your time and facilitate the installation and disassembling of the tripod, easy for you to use Material: aluminum alloy Delivery quantity: 1 piece Color: black Size: about 4.1 * 4.1cm