The forceps probably not served its purpose, but for my Cabelcon F-5.1 connector. For this purpose the distance of the clamping device is too large, so that no compression takes place. This circumstance should be formulated more clearly in the product description, because the above connector is already one of the most common variants. I've helped me with two small square nuts that have shortened the distance and so the pliers could fulfill its purpose for my plug.
