“This adapter allows devices with standard 1/4"” screw hole to be installed on the flash shoe slot. It includes 2 nuts which can be adjusted It can install NIKON SC-28 Flash Sync Cord to VH2000 Camera Flash Bracket Grip. It can install YONGNUO CTR-301P Remote Flash Trigger Flash Holder Umbrella Shoe stand Support. This adapter can stack two cameras. Material: anodized aluminum metal 4 pack of 1/4"" tripod screw to flash mount adapter Size:4 Description: This adapter allows devices with a standard 1/4"" screw hole to be installed on the hot shoe slot. It includes 2 nuts that can be adjusted. You can install a Nikon SC-28 flash sync cord on the VH2000 camera grip you can install the CTR-301P, RF602 on the hot shoe umbrella holder bracket. You can also connect two cameras together using this adapter. Package contents: 4x 1/4"" Tripod Mount Screw Adapter LRFR is committed to providing each customer with the highest standard of customer service. "