The item listed is a poultry plucker w/ 4 fingers installed. Your choice of yellow or black fingers please make note of color in PayPal. The plucking fingers locking grove is .80", plucking surface is 1.90", & overall 3.60". They fit a .75" hole.
I use this plucker myself. Without mounting the drill it requires two people (one to hold the bird & one the drill/screw gun).
This is the link to my old thread. Please take the time to read it to get a better fell for the item.