I bought the screws to replace the present on my Manfrotto-release plate screws. The present screw could be operated, what was annoying me just a coin. The present screw was easy to replace. I have removed the rubber plugs from the hole at the end of the slot in which the screw is and the old screw replaced by the new. All fits perfectly and now I can fix my Nikon 70-200 f2.8 VRII without additional tools stable on the removable disk. The screws were also delivered quickly - of course, not the next day.
I am delighted when the screws are offered at a similar price with 3/8 inch thread.
