1. 1-Iron: The 1-iron is the longest and lowest lofted iron in a golfer's bag, with a loft angle of around 14-16 degrees. It is typically used for long, low shots from the tee or fairway. However, due to the difficulty of hitting this club, many golfers have replaced the 1-iron with a hybrid or a fairway wood. 2. 2-Iron: The 2-iron has a slightly higher loft angle than the 1-iron, typically around 18-20 degrees. It is also designed for long shots from the tee or fairway but with more height and spin than the 1-iron. Like the 1-iron, it is a difficult club to hit and is not commonly used by many golfers. 3. 3-Iron: The 3-iron is a more versatile club than the 1 and 2-irons, with a loft angle of around 21-24 degrees. It can be used for longer shots off the tee or fairway, as well as approach shots to the green on longer par-4s and par-5s. Many golfers have replaced the 3-iron with a hybrid, which is easier to hit and provides similar distance and accuracy. 4. 4-Iron: The 4-iron has a slightly higher loft angle than the 3-iron, typically around 24-28 degrees. It is designed for longer shots from the tee or fairway and can also be used for approach shots to the green on longer holes. It is more forgiving than the 1 and 2-irons but still requires a certain skill level to hit well. 5. 5-Iron: The 5-iron has a loft angle of around 28-32 degrees and is designed for mid-range shots from the tee or fairway, as well as approach shots to the green on shorter par-4s and par-5s. It is easier to hit than the long irons and is a popular choice for many golfers. 6. 6-Iron: The 6-iron has a slightly higher loft angle than the 5-iron, typically around 32-36 degrees. It is designed for mid-range shots from the tee or fairway and can also be used for approach shots to the green. It is a popular club for many golfers due to its versatility and forgiveness. 7. 7-Iron: The 7-iron has a loft angle of around 36-40 degrees and is designed for shorter shots from the tee or fairway, as well as approach shots to the green. It is a popular club for golfers of all skill levels due to its ease of use and versatility. 8. 8-Iron: The 8-iron has a loft angle of around 40-44 degrees and is designed for shorter approach shots to the green. It is also useful for chipping around the green and shooting out of bunkers. 9. 9-Iron: The 9-iron has the highest loft angle among the numbered irons, typically around 44-48 degrees. It is designed for short approach shots to the green and is useful for chipping and pitching around the green.