Panduit JP2SBC50RB-L20 J-Hook Screw on Beam Clamp has a patented design, featuring complete horizontal and vertical 1” bend radius control which prevents pinch points and degradation of cable performance. They are suitable for use in air handling spaces and are UL listed. For use with flanges up to 1/2” (12.7mm) thick, rotates 360 degrees, 2.0” (50.8mm) max. bundle capacity. Made of Nylon 6.6, are black in color, and come in packages of 50.