The contents of the package were met with my expectations. 5/8" Threaded connector is suitable for Rycote Softie-Lite Kit 21, which have 5/8" Thread. (the usual is 3/8").
I will start using it with a light shotgun Schoeps MiniCMIT. I can fish over the river or at the Zoo. You do not have to climb to the sea to record the shaking of the sea. 5+
EDIT 01.Nov.2023: There are some issues that cannot be left unmentioned:
The holder is nailed to the pole, but it rattles.
When I move quickly, everything rattles, and this darn thing was not secure at all.
Fortunately, I can fix it by using a third party. I might deduct one point from the rating because of this, but it doesn't make the product worse. Because the price is damn good.
Mod is necessary. The end of the holder is cursed, this is a weak place in the construction!
First, it moves and can click by moving boom. Secondly, the rive can break as it happened to me and it is dangerous.
Good if this place was glued and fixed firmly. We made this place around and now I am pleased.
Edit. On 2 January 2024
I have added photos with improvements, where the nail has been replaced, and additionally, that part has been fixed and glued. The result turned out very well!
http://37.0.31.83/ajutine/Millenium%20Boompole%20L/IMG_8452.JPG