Get a better handle on things with the MK-X1EM Hand Grip for Select Sony a7 and a9 Series Mirrorless Cameras from Meike. The base is Arca-type compatible and attaches to the bottom of your camera via its 1/4"-20 threaded mount. The base increases the camera weight and minimizes shake when mounted to a head. It has a faux-leather tactile grip to improve handling and helps you feel more confident while shooting. A single 1/4"-20 socket mounts the camera if no Arca clamp is available, and a sensor centering line located on the back of the base lets you position the camera precisely in the middle of a compatible head.
Camera Compatibility
Sony: a7 II, a7R II, a7S II, a7 III, a7R III, and a9