This is special for Nikon. It mounts on a camera, provides spaced mounting points for flashes.
Features:
Support for Nikon's I-TTL. 
The splitter doubles the hot shoe for your camera / camcorder.
Also can trigger other types of speedlite and camera,such as for Nikon / Pentax / Olympus.
Can bear objects which weights up to 3 KG, increases the service life of your hot shoe.
Made of ABS & PC, makes it lightweight, convenient to use.
Specifications:
Brand: Andoer
Color: Black
Material: ABS & PC
Applicable Models: for Nikon D750 / D7200 / D7100 / D7000 / D800 / D810 / D600, etc.
Item Size: 10 * 2.8 * 2.6cm / 3.9 * 1.1 * 1.0in
Item Weight: 35g / 1.3oz
Package Size: 12 * 2.8 *3.8cm / 4.7 * 1.1 * 1.5in 
Package Weight: 52g / 1.8oz
Note:
When using with other types of speedlite and camera, it doesn't support TTL function.
Package List:
1 * Flash Bracket Splitter
1 * User Manual (English & Chinese)