For Sony a7 III, a7R III, and a9 | Integrated Arca-Type Mount | 4 x 1/4"-20 Accessory Threads | Provides Open Access to Ports and Slots | Pivoting Base Plate for Battery Access | Adjustable Side Plate | Anti-Twist Design | 3-Piece Durable Aluminum Construction | Black Anodized Finish | Included Hex Wrench and Flat Screwdriver | Limited 1-Year Warranty