https://www.smallrig.com/global/smallrig-manfrotto-drop-in-baseplate-2887.html

Package Weight (kg): 0.27

1. Allows quick attachment.

2. Optional anti-falling threaded holes are reserved on the bottom to prevent the quick release plate from accidentally slipping out of the baseplate when adjusting.

3. Finely adjustable locking width for compatibility with quick release plates of various specifications.

4. Multiple 1/4''-20 & 3/8''-16 threaded holes and through holes.