The Desmond DSP-1 Quick Release Plate with Sliding Backstop is an aluminum Arca-type compatible quick release plate that measures 2" wide. It has a 1/4"-20 threaded screw to attach to most cameras, as well as two safety-stop screws to prevent accidental release. This plate also has a sliding backstop which will provide additional security when attached to the camera. It includes two Allen keys for convenience.