Innovative patent pending low voltage cable hanging hook ( J-hook) designed to save your company time and money. No need to go up and down the ladder - it's all there! One of a kind locking spring steel clip for use on all diameter grid wires, pencil rods and all thread (4 mm to 9 mm). Hinging and locking top to secure cable in the hook during cable pulls, nothing to drop on the floor. Built-in tie strap to secure cables to the hanger, or stands vertical if you decide not to use it. Wide footprint design for good cable support and smooth contours for easy, low friction cable pulls. UL-ULC Certified DWMU E332787 for Plenum environments (Exp)