This adapter can connect Shoe to 1 / 4 "-20 screw
For example, using it you can install NIKON SC-28 FLASH Sync Cord to FLASH SHOE , or you can install Nicna CR-301P Flash Remote Trigger to Flash Shoe
This adapter have two nut and the nuts are removable.
This adapter can pile up two cameras.....
Material: Anodized Aluminum Metal