Very good for inserting and removing BNC cables. The inner edge of the tube has serrated teeth that firmly grip the BNC connectors. Many of these instruments are inferior because they have a smooth head. The tool is 11-1/4 inches long. You must be careful to buy cables that are larger than the BNC head without a strain relief. I use Paladin Tools 9740 SealTite compression connector with RG6 cable and tool. fits good.