Used only a few times. The following is a copy and paste from the product page: 【Freely switch between horizontal and vertical】: The Ulanzi camera cage allows you to rotate the mounting plate 90 degrees by unlocking the knob, allowing you to switch between horizontal and vertical shooting. You can switch without removing the camera from the tripod head, saving the trouble of disassembly, adjustment, and alignment. 【Excellent expandability】: The 1/4"-20 and 3/8"-16 screw holes on the bottom support handles, etc., increasing stability in handheld mode. Also, strap slots, 1/4"-20 screw holes for wrist straps, quick release plates, etc. 【Lightweight and sturdy design】: The tripod mount ring is made of aerospace metal materials, precisely CNC machined, hollowed-out lightweight design, polished finish, and surface anodized finish. The net weight is about 107g, and the inner diameter of the tripod ring is about 63.5mm. 【Compatibility】: The camera-specific rotating ring is compatible with Sony FE16-35 F2.8GM/FE 24-70 F2.8GM/FE 50 F1.2 GM/FE 85 F1.4 GM/FE 24-105mm F4G/FE20-70 F4 G/FE PZ 16-35mm F4G/TAMRON 17-28mm F2.8/TAMRON 28-200mm F2.8-56. A quick-release plate function has been added to the bottom, making it more practical.