These 1/4 in. Black Polyethylene Masonry Staples firmly secure RG-59, RG-6 and RG-6Q 75 ohm coaxial cables and multiple phone cable into concrete block, mortar-lines, wood and stucco. A zinc-plated hardened nail hammers easily to penetrate various types of masonry including cement block, mortar or plaster surfaces. The black polyethylene saddle features UV resistant properties and will not rust, rot or deteriorate over time. Use to secure coaxial cable to walls and/or floors both indoors and out. Made in the USA. Caution: Driving staples too firmly may damage insulation when used with non-metallic sheathed cable. Not for use with portable cords. Safety First - Shut off power before working on a circuit. Use approved materials and conform to all electrical codes.