I bought this tool for use with a Manfrotto tripod and Fluid Video Head to mount my little telescope on, the usual photo adapter plate is too smal for safe connection on a big tripod, this MANFROTTO 357 is the best match for this and it is safe and strong. Highly recommend. (I have to mention thatthis tool is included with the Manfrotto MVH502AH video head, but I bought it for a friend!)