The Accessory Rail Cube ARC-1 can be used on the SMB and LMB Accessory Adapter as well as on the Accessory Rails ARC-1, ARC-2 and ARC-3. It can be locked off by turning the lever 90°. Accessories - such as an articulating arm or a Cinetape - can be mounted on four integrated 3/8-16” interface, which offers aight different holes for securing pins.