I purchased this for use with the α7III and only checked the fitting once. Since I haven't used it, it's practically unused. This is an attachment plate that solves the problem of the little finger not having a place to rest on mirrorless cameras. It is also compatible with Arca-Swiss. The quality is very good and I used it conveniently, but I am selling it because I switched to a battery grip. INPON Quick Release Plate, Arca-Swiss Compatible, with 1/4" Screw, for Sony α7III/α7RIII/α9, Dedicated Little Finger Rest I will pack it carefully and ship it via anonymous delivery.