The Lastolite Tilthead Shoe Lock is a mounting bracket
that allows you to use an umbrella with a portable flashgun on a stand.
The Tilthead's screw locking shoe mount will accommodate most flashgun
hotshoes, and the umbrella socket allows you to use a bounce or
shoot-through umbrella. The Tilthead fits any stand or other support
device with a standard spigot treatment. The ratchet-style pivot on the
Tilthead eliminates any sudden movement when the screw is tightened.