The Hasselblad camera is a wonderful workhorse camera. However, if its not only jammed, it will not only cost you more than $50 in repair bills, but will also paralyze your camera that may be missing your shots. This tool is an absolute must have in any Hasselblad bag. If a problem occurs, simply use the small end of the CameraKey to adjust the locking screw on the inside of your Hasselblad body and lock the fastener again. The large end of the CameraKey is used to relock a shutter release that has been released when the lens is removed from the body.