Abstract: An aerial block which is releasably mounted on a support cable either at a pole or in a span between two poles for installing coaxial aerial cable which then is secured to the support cable. The block has a frame formed by two spaced generally L-shaped members connected by a lower stabilizing bar. The vertical upstanding portion of each L-shaped member has a hooked end which suspends the block from the support cable at a pole location. The stabilizing bar abuts the pole to maintain the frame in a position wherein the leg members extend horizontally outwardly from the pole to provide two spaced points of support for a coaxial cable being installed to prevent kinking or bending of the cable. A spring-biased plunger mechanism is provided on each of the vertical leg members for releasably attaching the frame on the support cable between poles.