The Quick Release Plate for 7D, A7 II's with VG-C2EM , A7R with VG-C-1em is compatible with all Arca-Swiss style quick-release clamps, such as those from Arca, Foba, Kirk, and Wimberly. This plate was designed specifically to match the 7D, A7 II's with VG-C2EM, & A7R with VG-C-1em. Its glove-like fit maximizes the contact area with the bottom of the camera, thereby minimize the flexing of the camera body and preventing your 7D, A7 II's with VG-C2EM , A7R with VG-C-1em from rotating or otherwise moving on the plate. The 2177 Quick Release Plate is ideal for lightweight tripod heads with Arca-style clamps, and it's intended for photography applications for which light weight and perfect fit are priorities.