This is the prosthetic finger system from Point Designs. I haven't seen that one before. Unlike Naked Prosthetics' fingers, Point Designs' seem to address mainly the need of people with MCP joint-level or ray amputations of the hand. So kind of the same demographic as Ian Davis's fabulous prosthetic hand system, but much less complex.
They use a simple ratcheting mechanism that's designed to be washable, almost maintenance-free and able to withstand 150 lbs of pulling force:
Point Designs supplies an "impression kit" - basically a pot of quick-cure 2-part latex - to take a print of your residual hand and send it to them for fabrication of the socket. So presumably, if you have a handy friend to help your out, you don't need to visit a prosthesist and you can do it at home, potentially saving you money:
Finally, Point Designs offers free fingertip pads for the lifetime of the prosthesis and a 24-month warranty that covers manufacturing defects.
Not too surprisingly, I was unable to find any pricing information.
More worryingly, I was also unable to find any independent review or material apart from the company's own or their distributors'. So ultimately, I have no idea what those fingers are worth.
But they seem really cool so I figured I'd share.