This 1/4 adapter screw is exactly what I needed to fill fix a DSLR on a slider and a Glidecam. Very good quality, the thread is robust and very well machined. I recommend this Manfrotto adapter.
The diameter of the plate is not sufficient for a clamp (clamp) monorail room, which generates instability. Probably more suited for a digital FF or APS-C. The price seems excessive.
Just remember to take one by patella, or buy tweezers, rubber suction cup is, and as long as you clench a little, it will be impossible to remove it by hand :)
not easy to assess such a small piece of good workmanship, but the photo is misleading as the diameter is not indicated I expected more in reality the diameter of the adapter is 3cm it remains solid ;;; Manfrotto - 088LBP - Screw Adapter 1/4 "to 3/8&