Niceyrig Nato rail 425 is a great assistant accessory for your camera rigs assembly. It can be attached to the arri rosette handles easily such asNiceyrig Arri Rosette Handle 423/424/252/149/145.It comes with multiple 1/4’’ thread holes for more DIY operation options. Additionally, it can be mounted on the top of cameras and also works for shoulder supports dual handheld system.