Self-Developed Patented HawkLock Quick Release Structure: One-button stable self-locking, smooth sliding, and improved disassembly and assembly efficiency. The quick release cage is also compatible with your existing traditional cold shoe, NATO rail, and for Arca accessories. | Full Access & Anti-Scratch Design: The cage will not affect the use of camera interface, dial, button and the replacement of battery. The battery compartment is equipped with an opening and closing wrench to better fit the body curve, and enhance the body grip. Built-in all-round protective gasket to prevent the camera from scratching. | Three-Point Locking: The camera is locked by the bottom positioning pin, 1/4"-20 screw and the left M2.5 screw, which is stable and does not deflect. The direction of the left locking slider can be adjusted to adapt to different models. The [A7 IV] logo side is suitable for Alpha 7 IV and Alpha 7R V, and the [A7S III] logo side is suitable for Alpha 7S III / Alpha 1 / Alpha 7R IV. The bottom of the cage has a built-in magnetic wrench for easy disassembly and assembly. | Note: 1. After fixing the bottom 1/4"-20 screw, please remove the anti-deflection pin at the battery compartment from the temporary hole and fix it to the corresponding position. 2. When using the side lock, you need to remove the shoulder strap hook on the left side of the camera first. | Multiple Interfaces: 1/4"-20 threaded holes, 3/8"-16 positioning hole for ARRI can attach Top Handle 4483/3765, Side Handle 4485/4015, Monitor Mount 2903B; Built-in 2 HawkLock cold shoe can attach microphones, LED video lights etc.. The bottom HawkLock quick release plate for Arca is compatible with DJI RS 2/RSC 2/RS 3/RS 3 Pro. The wrist strap holes on both sides and the bottom are compatible with Wrist Strap PAC2456B; the QD hole at the bottom is compatible with the QD shoulder strap. | Compatibility: SMALLRIG Quick Release Cage 4481 is designed for Sony Alpha 7R V/Alpha 7 IV/Alpha 7S III/Alpha 1/Alpha 7R IV to provide mounting points and full protection.