When do I need the AdapterPlate?

-You’ll need an Adapter Plate if you want to combine a Spacer with the Invicta QuickRelease. The AdapterPlate makes a seamless transition from the Invicta QuickRelease PCD (50.8mm) to the PCD of the Spacer (70mm)

Included is:

BavarianSimTec Adapter Plate
(3x) M5 x 12mm (Countersunk Screws)