This sale is for a near mint condition Stitz Multi Angle Grip for use with Mamiya RB67 and RZ67 cameras (and with many others, not just Mamiya). The grip is suitable for use on all RB67 and RZ67 cameras, and simply connects to the bottom of the camera body. A cable release is part of the grip.
This really rare grip allows you to angle the camera at almost any angle you want relative to the hand grip. There are minimal signs of use. Equivalent to the Mamiya multi-angle grip – but better!