This is one umbrellas light holder with a 12' power cord and on/off switch. Fits light stands from 1/4' to 5/8'.1... AC socket light holder.
From the Manufacturer
The CowboyStudio AC Socket & Cord Set comes with an umbrella holder and light stand mount, which makes it perfect for every photographer.
The swivel adapter lets you have full control over your continuous light. Mount your bulb to the swivel adapter and then set it on any of your standard mount light stands. Besides having a built in umbrella mount, this product can mount onto any stand light stand.
Mounts on any standard light stand
Holds any bulb with a standard E26 base
Maximum capacity is 105 watts
Easy to mount an umbrella in the adapter
Umbrella, bulb, and stand are not included with this kit