"Part of a dummy's hand. Made of celluloid."
"Part of a dummy's hand. It's made of metal."
A not too dissimilar dummy finger can be obtained in the main game as well, by Clancy Jarvis and Ethan Winters.
In the main game, it serves as a mandatory key item for Clancy to progress through Lucas Baker's "activities" while it is passable by Ethan Winters should players know how to escape death by chronicling Clancy's exploits.
The Dummy Finger can be found in a draw near the blocked main entrance.