This 30 pack N Scale body mount coupler adapter for is designed for Micro-Trains 1015 coupler to fit Intermountan 4750 Cu. Ft. 3 bay covered hopper. Comes with two tools for drilling locating hole into bolster of the model. Just remove the trucks, insert the tool into the bolster with the guide hole facing toward the end of the car, and drill a 1mm hole into the bolster hole.
In structions can be found here:
https://photos.app.goo.gl/TfSDZWrDbB3Z339o9