SmallRig SR3180B (3180B) Standard Cage Kit for Sony Alpha 7S III SmallRig Standard Cage Kit for Sony Alpha 7SIII3180locks the camera firmly via one 1/4-20 screw on the bottom and one M2.5 screw on the side. The M2.5 screw needs to pass through the shoulder strap holes on the side of the camera. The cage 3065 features multiple standard mounting points and gives you full access to all the ports bottoms and the battery door of the camera. In addition to multiple 1/4-20 3/8-16 threaded holes and shoulder strap holes the cage also comes with standard NATO rails and cold shoe mounts. You can mount accessories on the cage such asSmallRig Monitor Mount 2904 microphones SmallRigSide Handle 2187andHSN2093 etc. In order to prevent the cameras HDMI cable from accidental disconnection the cage is equipped with an HDMI cable clamp which can be attached to the side of the cage via a 1/4-20 thumbscrew and the locking part is adjustable. The cage is made of magnesium-aluminium alloy material which reduces 40% weight than a traditional cage. Moreover there is a magnetic screwdriver on the bottom of the cage for your assembly.