These T-Bar Hooks are used to support cords on suspended drop ceilings. They work with 1 inch wide suspended ceiling framing, and we include these with many of our camera and light ceiling supports. These plastic hooks easily open and clamp to the frame and the hook opening will support cords up to 1/4 inch in diameter. Use these hooks to support power and HDMI cords. Easily removed and moved to a new position. For more permanent installations use nylon cable ties to secure cords to the T-Bar Hooks.