Gardner Bender PEC-31525WA Cable Clamp Coaxial Cable Clamp, Secures RG-59 & RG-6 Coaxial, 1/4"., Black This 1/4 inch. Coaxial cable clamp is designed for use with RG-6 & RG-59 Combo screw for safer installs Screw-in depth 1/2 inch 25 per pack