I've know about that tool for six years when a mate asked an electrician what their most useful tool was , I thought nothing of it, but six years on now in the hand I understand (Canadian brand I've not found how to source the other sizes)
Richard tools are for drywallers and finishers.
They make all kinds of rollers, scrapers, and shaping tools. Try the paint and drywall sections of your stores.
I've know about that tool for six years when a mate asked an electrician what their most useful tool was , I thought nothing of it, but six years on now in the hand I understand (Canadian brand I've not found how to source the other sizes)