Prerequisite: Tiefling
Once per round, you can spend a free action to draw or stow an object weighing up to 1 pound with your tail. This feat does not give you the ability to make attacks with your tail.
You can use your tail to make Thievery checks when you hands are otherwise occupied. Your tail can use thieves tools.
Adapted from Player's Handbook Races: Tieflings (2010)