PSL-a7RIVG Custom L-bracket for Sony a7riv a9ii with battery grip VG-C4EM Arca RRS compatibleAero space grade aluminum material, elaborately CNC machined with high standard hard anodized finish, making it extremely durable. The QR plate uses Arca swiss dovetail structure, compatible with tripods or ballheads of different brands such as Arca Swiss RRS SIRUI BENRO FOTOPRO MARKINS. All Sunwayfoto dedicated L brackets are custom made for perfect fits with the cameras, seamless connection ensures there is no interference with data cables, screens