Toyo 70mm Tripod Mount Block features 3/8" sockets. Standard on TOYO 5x7 and 8x10. Standard on TOYO 810MII. Features 3/8" socket.

TOYO tripod mounting blocks feature quick clamp fittings for easy removaland attachment of cameras to tripod.
TOYO tripod mounting blocks feature quick clamp fittings for easy removaland attachment of cameras to tripod. For extreme extensions using the longbellows or by adding an intermediate frame and 4x5 bellows with the 810GII,we recommend using an additional #180-724 tripod mounting block and doublecamera arm which mounts on studio stand or tripod with 3/8" thread.The arm can also be used with other types of cameras and long lenses. Tophas two 3/8" platforms.