There are screw holes on all sides of the product, 14" ARRI Locating Screw Holes and 38" ARRI Locating Screw Holes, which can expand the corresponding accessories and prevent the fitting from reversing.Install and use stable, prevent screw fitting reversal, each side has M3 screw holes mounting machine meter screw, which is used to fix the corresponding screw so that it will not be reversed: M3 screw hole distance 15mm also installs and expands the corresponding accessories.The Single or double-layer transfer screw adapter option, it has rich expansion and powerful performance: each surface of the product has expansion screws, with can expand the corresponding ARRI screw accessories.Special Type C: with damping rotation; the upper and lower layer Cube are damped, can be rotated 360 degrees and can be adjusted to the installation angle you need.Special Type D: Magic Cube with Tripod Adapter Compatible with GoPro Action Cameras, can be installed and fixed into the accessories for Gopro and similar cameras.