Norman R4108 Umbrella Stand Adapter with "Locking Teeth".

Connects to the 1/4" x 20 threaded hole in Norman LH2 and LH52 or similar lampheads, allowing them to be used on light stands. Mounts on 3/8 inch stand top, with inserts available for use on 1/2" and 5/8" stands. Includes built-in umbrella holder.