SmallRig Camera Cage for Sony Alpha 7S III 3065 locks 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 as SmallRig Monitor Mount 2904, microphones, SmallRig Side Handle 2187 and HSN2093, etc. The cage is made of magnesium-aluminum 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.