Prevent Twisting The cage secures to the camera via a 1420 screw on the bottom and an m25 screw on the right side for further security to prevent twisting Multiple Thread Holes Multiple 1420 and 3816 threads for accessories such as Top Handle 2165 and Monitor Mount 2903 Cold Shoe and NATO Rail Integrates a cold shoe on the top for microphone and light and comes with a NATO rail on the left side for NATO Handle 2187 and Magic Arm 2071 Allen WrenchA flat head screwdriver with Allen wrench is included to secure the camera screw and stores on the bottom of the cage The cage provides strap slot on the side for carry strap Optional Cable Clamp 1679 Optional Cable Clamp 1679 is separately available to protect the port