The Tilt head Shoe Lock features an adjustable 'screw locking' shoe mount which offers an additional locking mechanism to work alongside the built in method used on the flashgun. The dimensions of the Hot shoe on the bottom of each flashgun can vary from one gun to the other. However, the Tilt head Shoe Lock can comfortably accommodate these variances. Product Features Compatible With Flashguns This item will work with your flashguns. Umbrella Socket This product features a socket designed to hold a photographic umbrella. Will take 7mm Umbrella Shaft Will take 8mm Umbrellas Shaft Will take 10mm Umbrellas Shaft depth 1.57 in height 3.54 in weight 0.31 lbs. width 2.76 in