SMALLRIG 2521 NATO RAIL 48MM W/ ARRI LOC SCREWCompatible with all NATO accessories ###split### Attaches to ARRI standard accessory mounts using a 3 8" 16 screw and two locating pins. It features a NATO rail on the top. Compatible with NATO accessories like SmallRig NATO Handle 1955 or 2187, SmallRig Ball Head Arm 2071, SmallRig NATO Clamp 1973 or 2207, making it easy and quick to release devices. The spring loaded safety pins on both ends prevent your devices from accidentally sliding off.