The unique shape of the Manfrotto 244 MICRO Variable Friction Arm Anti-Rotation Adapter allows camera accessories and equipment to be interlocked and secured. As a result, the arm does not rotate while taking panning shots. The attachments can be easily replaced using the included hex key. The adapter is compatible with the 244 Mini Friction Arm and 244 Micro Friction Arm with Anti-rotation. This anti-rotation system is compatible with the 055 series, 190 series, and 368B-1 Nano Clamp from the Manfrotto range of products.