This is the standard and simplest flash shoe adapter that works with the enormous lineup of SCA-system Metz flashes. The SCA system of flashes are wonderful for their capacity to "talk" to just about any camera as if they were the camera manufacturer's accessory flash itself.
The SCA 301 can be used safely with any flash shoe, hot or "cold", though if the shoe is "cold" you'll need to use either the 36-50 or 36-52 PC cord to fire your flash from the camera's PC socket. These are both listed here as recommended accessories.