The J hook with hammer-on beam clamp for flanges 9/16" to 3/4" (14.3 to 19.1mm) thickness. This hook rotates at 360 degrees angle. The J-Pro™ cable support system is designed to provide a competitive alternative to metal J hooks for routing cables throughout physical infrastructure. This system provides complete bend radius control and includes many easy to use mounting options to provide lowest installed cost. The selection of multiple sizes, colors and pre-riveted J hook assemblies meets requirements of a wide variety of applications and are suitable for use in air handling spaces.