The TY-BG Quick Release Plate from Sirui is an Arca-compatible plate for cameras with battery grips. It features a safety-lock design that prevents the camera from accidentally sliding off the head if the quick release clamp is loosened.This TY-BG not only fit the Sirui G and K series heads, but also quick-release clamps from several other manufacturers, such as Acratech, Foba, Graff, and Wimberley. The plate&';s thumbscrew has a flip-up element that enables you to insert it tool-free into any camera&';s 1/4"-20 thread.