Advantages: 1. Made of well-coated metal material, high hardness, strong grip, and longer use. 2. Adjustable lighting angle allows you to 360-degree rotate the clamp lamp fixture at will. 3. Ball joints' non-slip design makes light fixture connections more secure. 4. Adjustable thumb screws allow you to adjust the light fixture tight by hand at any time. 5. The non-slip rubber cover design of the grip wouldn't be scratched and wouldn't leave marks on the surface. Instruction: Step 1: Connect the clamp to the sockets of the lamp. Step 2: Step 2: Squeeze the body of the clip with your hands to make the end of the clip open. Step 3: Clip the rubber grip to a suitable place. Step 4: Adjust the lighting angle. Application: The adjustable dome lamp clamps can be used as desk lamp clamps in your room, garages, or art studios, as light holders for photography and workshops, and grow lights for house plants. The maximum compatible size of the lamp clamp is 36mm/1.42 inch, suitable for mini deep dome light fixtures, reflectors, etc. NOTE: The maximum compatible size of the lamp clamp is 36mm/1.42 inches. Due to manual measurement, the size will have a 1-3mm deviation. Color: Black, Silver Material: Metal Overall Size: 250 x 80mm/9.84 x 3.15 inch Clip Bracket High: 4.33 inch / 11 cm Clip Width: 36mm/1.42 inch Packing List: 2 x Metal Dome Lamp Clamp Fixtur