SmallRig L-Bracket for Sony Alpha 7R IV and A9 II 2939 attaches to the camera using a 1/4"-20 screw, with anti-twist design and rubber pad preventing wiggles or scratches.Both the side plate and base plate are Arca compatible, allowing quick switch between horizontal and vertical orientation shooting. The L-Bracket does not block buttons, ports, LCD screen or battery switches of the camera. The whole L-Bracket can extend to left by 20mm if you need more room for tethering or cable release. It also comes with 1/4"-20 accessory threads allowing mount of accessories, such as SmallRig Cable Clamp 2259, or SmallRig Cold Shoe Mount BUC2736. A flat-head screwdriver is kept on the base plate for easy access.