SmallRig Mini Quick Release NATO Rail (48mm) 2172 is the thinnest NATO rail in the market. Fixed by 1/4''-20 screws to devices such as camera, monitor, wireless video transmitter or receiver, etc., it works with NATO clamps for quick attachment and release. It features safety pins on both ends to prevent accessories from accidentally sliding off. It is a low profile so there is no need to remove it before putting your devices back into cases.