Iron clubs are varying in sizes and shape according to the players situation, height, age and gender. There are about 9 irons in a golf club bag but size 1- iron is the most hardest to play. Generally the players select the irons between 2- to 9-. These are used according to the situation i.e. rough, teeing ground, bumpy area or bunkers. The no 1- iron is the hardest and most difficult club placed in a bag to hit. Lee Trevino has his famous quote that when it would be raining and storming hard I would take out my size 1- iron and point it to the sky 'because even God can't hit a 1 iron'. The place of no 2- iron has now been taken by a pitching wedge and the 3- and 4- iron are also on the verge of getting omitted.
An iron club is based on four components: Club head, Hosel, Shaft and the Grip. The club head of an iron has undergone a lot of changes which can now be called as muscle back and cavity back. The muscle back is an older design in which the weight is not distributed around the head and so the players require a great deal of skill to hit the ball correctly because the 'sweet spot' or the hitting area is very much small. It requires a master player to handle a muscle back iron.
The cavity back iron is a very popular design for new players or people who are ignorant from golf. The weight is distributed by the insertion of a casting which enables the player to airborne the ball with a great trajectory. The hosel is the area which is placed farther from the hitting area so that the balance of the head is not disturbed by it. The shot can face a serious failure if the hosel is near the hitting area and the ball gets a hit by the hosel before touching the head.
The shaft is the true technical component of a club. The shafts were previously made by wood only and were at the risk of getting broken. Soon they were replaces by steel and although many other alloys of steel and much shiny and stronger metals are used in manufacturing of golf clubs the steel never goes out of fashion. The most recent material after titanium and platinum is carbon fiber from which these shafts are made. The grip is generally made up of leather or rubber varying in shape. Before the attachment of leather or rubber the grip was a slightly bulging area of shaft. Thus iron clubs are in no risk of going out of fashion until 2020.