Passes through door of refrigerator (et al). 1/4" thick-wall tubing goes on the nipple end and a faucet on the other. Securely holds faucet (tap) on door. See the DELUXE FAUCET also.
This coupler is for Sanke kegs, which is pretty much all american macro brews. This is the part that actually "taps" the keg. You would still need a gas source/regulator, thick-walled tube, and dispensing faucet.