Irons are the clubs most likely to be used from the fairway, although they are often hit from the tee, too (especially on par-3 holes).
Irons feature thin, grooved faces of varying lofts. The most common array of irons carried in a set of golf clubs is 3-iron through pitching wedge (3-, 4-, 5-, 6-, 7-, 8-, 9-irons and PW). Many golfers add a sand wedge to the assortment. Some also carry a 1-iron or 2-iron and a gap wedge or lob wedge.