1. The expansion board has 9 inch 1/4 screw holes and 2 3/8; screw holes, which can be freely matched with different accessories.
2. Standard cold boot, which can be connected with 1/4 screw hole through the inch 1/4 screw.
3. Adapter. It can be used on accessories with 1/4 screw hole, such as tripod, self-timer, etc
4. Lock the screws to prevent the expansion plate from deflecting..
5. Easy to install and disassemble.
