STRONG AND DURABLE: The wall mounting boom arm is made of high-quality metal material, sturdy and corrosion-resistant. LIGHTWEIGHT AND PORTABLE: This Light stand adapter is great for wall and ceiling mount. SIMPLE TO MOUNT: Designed with 4 pieces screw hole helping mount the boom arm on the wall and ceiling to save a lot of time and space WIDE APPLICATION: Comes with 1/4 adapter screw to apply to different flash. NOTE: Comes with 4 expansion screws, which is well built and sturdy to ensure the stability, but is not suitable for thin cement ceiling and plaster walls.