This collection is for the RatRig CNC Toolhead designed by @Cristian I of Romania and manufactured by Mandala Rose Works in the USA.
There are a lot of options for this product, so PLEASE READ CAREFULLY!
There is a Core component, which is needed for any configuration. This core component is the Uprights and base panel. You will need one of these for a CoreXY implementation, or 2 of them for a IDEX Implementation.
As far as BackPlates are concerned, there is 1 back plate for CoreXY/Hybrid and 2 slightly different back plates for IDEX. Select the back plate based on whether you are doing CoreXY/Hybrid or IDEX.
After that, you will need to choose a top plate, and 1 of the 3 extruder adaptors required to mount your extruder of choice. Please see each of the individual adapters to see details for what they support.