A pull out kitchen faucet carries a spray head that detaches from the spout and returns on a counterweighted braided steel hose. For anyone who genuinely cooks it is the more useful design, because you can rinse the walls of the basin, fill a stock pot standing on the counter, and aim the water where the work is rather than where the spout happens to point.
Most of these are dual mode. A control on the head alternates between an aerated stream and a spray, and several switch to spray automatically as the head is drawn out. If you rinse produce or wash down the basin often, that is the feature you will use daily.
The mechanism is the part worth paying for. A stainless braided hose and a properly weighted counterweight are what decide whether the head returns cleanly into the spout on the thousandth pull rather than hanging slack. All of these are solid lead free brass.
Check the spout reach against your sink width before ordering. Both spout reach and spout height are listed in the specifications on every product page.