"The quick release camera plates by Acratech are compatible with plates from Arca-Swiss, Kirk, Wimberly, Really Right Stuff, Foba, and any other tripod heads that accept the Arca-Swiss mount. Acratech's quick release camera plates are very lightweight, precision machined. They are well suited to nature photographers, landscape photography, large and medium format, digital and 35mm SLR cameras, and outdoor photography. These plates are the perfect combination for your light weight tripod head, or any photography application where weight, and a perfect fit are priority. Acratech Quick Release Plate #2133 Fits the following cameras: atat Canon EOS 5D with BG-E4 atat Canon EOS 10D with BG-ED3 atat Canon EOS D30 with BG-ED3 atat Canon EOS D60 with BG-ED3 atat Canon EOS 1D MKIII atat Canon EOS 1DS MKIII atat Canon EOS 1DS MKIV atat Olympus E-1 w/ SHLD-2 atat Canon EOS 7D w/ BG-E7|Acratech quick release plates are designed to allow access to all camera controls and functions without removing the plate.|Acratech quick release plates are designed to provide maximum contact area to the bottom of the camera increasing stability and helping to minimize flexing ofthe camera body.|We do not cut a groove under the head of the mounting screws which weakens them at a point where they are already most likely to break.|Our plates are precision C.N.C. machined from solid 6061 T-6 aluminum. We do notuse inferior castings like some manufacturers.|Made in the U.S.A.|We use advanced computer aided design software to create super strong lightweight plates."