Dual Ground BlockPerfect for all TV antenna, cable TV and satellite installations. Local codes in most areas require that the signal cable be grounded on an exterior wall, at the point where it enters the structure. This block provides feed-through for one or two cables, and a secure ground lug for attaching ground wire. Patented DSM seizure provides superior center conductor retention, reduced common path distortion, excellent electrical performance and bandwidth up to 3GHz.