SMALLRIG Base Plate for Sony A7R V/A7 IV I used this on my α7 IV for about a week, but I'm selling it because I no longer need it. Please check the condition in the photos. Arca-compatible With quick release plate Bottom mount plate Scratch-resistant, warp-resistant ID: 3666B From the Amazon product description: 【Compatible with Alpha 7R V/Alpha 7 IV】 Base Plate 3666B is designed to improve camera grip, enable quick switching between tripod, handheld, and other shooting scenarios, and protect the bottom of the camera. 【Form-fitting design】 There is an opening wrench next to the battery compartment. The structure of the new version is optimized to fit the curves of the camera body, making the little finger more comfortable when gripping. The handgrip of the base plate is embedded with carefully selected first-layer cowhide, creating a high-quality texture that integrates with the camera body. 【Multiple mounting points】 It has a QD interface, 1/4"-20 screw holes with 18mm spacing, and a cold shoe on the bottom, allowing for expansion with QD shoulder straps, mini tripods, microphones, and other accessories. 【Arca-compatible quick release plate】 It has an Arca-compatible quick release plate on the bottom, enabling quick switching between tripod, DJI RS 3/RS 3 Pro/RS 2/RSC 2 stabilizers, and handheld shooting modes, which is convenient. It can save time. 【Scratch-resistant and warp-resistant】 Connects to the bottom of the camera via 1/4"-20 screws and positioning pins, and the built-in protective gasket prevents scratches and warping of the camera. Easy to disassemble with the built-in magnetic wrench. Easy to assemble.