Preformed Line Products DE-1601 Telegrip. Cable Type (mm) .312" - .315" (8 - 8) QUAD RG6/U. Telegrips are designed for service drop applications of coaxial cables. Flexible but firm, Telegrips exceed mechanicalholding requirements for coaxial cable. The long length design reduces stress levels and eliminates the possibility of crushing the cable or affecting its dielectric properties. Also, its unique gripping principle prevents bending that can cause “snow” or distortion of the television picture.