The Manfrotto 625 RC0 Hexagonal Quick Release Adapter is designed for heavy duty use and is a great addition to any existing tripod head.

Designed for heavy-duty use, the Manfrotto 625 RC0 Hexagon Quick Release Adapter is a great addition to any existing tripod head, providing ample surface area for a very sturdy and reliable camera mount.
The RC0 system has been a trusted choice for professionals for years. The strength of the system lies in its exceptional versatility: a wide range of different quick-release plates are available for it, sold separately. The range includes, among others, larger plates with 3/8" threads, flat-bottomed plates for placing the camera on a table, architectural plates with anti-rotation for vertical shooting, anti-theft plates with wire attachment and an extra-large plate for large format cameras. The system also comes with an L-shaped bracket, which allows you to switch between horizontal and vertical images without moving the tripod head itself.
Specifications:
The package includes: