This AC Socket has a Ceramic base which will handle bulbs with high voltage up to 1000 watts.
The holder is attached with a socket, stand-adapter, umbrella screw hole with a screw for tightening, built-in on/ off power switch, and a 10' power cable with a wall plug.
Can be used at the top of studio light stands with a 3/8 inch or 5/8 inch stud. Its fixing screw can keep the umbrella sitting firmly. On-off switch.