What is this?Typically used the light lamp knob to replace old or damaged socket keys for lamps and fans.What will I get? Packing List: 4 x On/Off Lamp Switch Knob Replacements; Color: Gold Tone; Material: Metal; Size: 1.9 x 1.2 cm/ 0.75 x 0.47 in (L*W);Are there any advantages of the product?The lamp Switch Knob Replacement is made of quality metal, Surface plating, which is durable. and thread design makes the light lamp knob replacement are extremely easy to twist, greatly reducing hassle during installation.How to use it?Simply remove the original knob from the original lamp or fan and install it correctly following the direction of the new Lamp Switch Knob Replacement's threads.What should I notice?When installing Lamp Switch Knob Replacement, be sure to rotate the knob in the correct thread direction to prevent the lamp knob replacement from slipping due to incorrect rotation.