Over in the motorcycle world, it's kinda surprising how little sales volume will attract the attention of a Chinese counterfeiter who will then make something that looks like the same widget and flog it on fleaBay and scAmazon. I don't know how they do it so fast and cheap, honestly.
The inventor's main defense for many of these is manufacturing quality; only the genuine article fits tightly, has the correct hardening, high quality threads, etc. and won't destroy your engine or whatever. The stakes are high on a lot of motorcycle upgrade parts, so almost everyone is careful to get the real thing from a known supplier.
And that may or may not apply to your tool concept, of course. Maybe it's clever idea that's relatively simple to manufacture, or maybe it depends on some critical tolerance, hard-to-machine shape, or special cutter hardening to work correctly.
In other words, one of the next important steps is to invent how you're going to manufacture your invention. That's a lot harder.
Good luck!