Thank you . It's so GOOD.
This fit's perfectly on my Acra Bone Head.
Well engineered and just does the job. I use it with a 35-100 Olympus SHG lens (1.65kg), on an Arca Swiss B1, so it quite a weight to manage, but does the job. When using the lens hand held, the plate also gives you a good surface to grip onto.
I use this plate directly under my tripod heads. That way I can change the head to what ever head I want to mount on the tripod dovetail clamp. The only thing I wish they included in their design was the cap screws that prevent the head or camera from sliding out by accident. The clamp works well with Wimberly and Arca style dovetail clamps.
It is kind of heavy, but stable and strong. The only bad thing is that you need a hexagonal internal screw to tighten and loosen it from the camera/lens.
Acra Swiss makes quality products. A solidly built, basic quick release plate. I use it for 400mm amd 500mm telephoto lenses. The large surface area provides a solid mounting platform. The single 1/4" built in mounting screw has a 7/16" hex head with a slot for a large standard screwdriver or a coin. I use a 7/16" socket for tightening but a standard screw driver or a quarter coin work ok.