Costco Members: Callaway Edge 10-Piece Golf Club Set (Right Handed, Graphite) Expired

If you can hit a four iron consistently you probably should get better clubs

Not a question of better, more a question of your personal situation. Note that this only applies to the irons, as virtually every driver and wood has a graphite shaft these days.

Steel is heavier and stiffer, and more durable. Most PGA and LPGA pro golfers use steel. If you're younger, stronger, have or will have a fast swing speed, and can tolerate the jarring in your hands from a bad shot, go with steel. In fact, many coaches will recommend steel because you get better feedback in your hands. It will give you more control and less distance than graphite, but again if you inherently have a fast swing you'll be getting your distance. There's a reason the pros use steel.

Graphite is lighter and absorbs shocks better than steel. If you take a bad shot with graphite, your hands and wrists won't pay for it. Additionally if you have a slower swing, the graphite will give you more distance. However, you lose control since the graphite is a bit more "floppy" than steel, and because the graphite absorbs shocks you don't get that feedback when you mess up. Graphite clubs are most commonly seen in senior or women's sets, though plenty of women use steel as they prefer the shot control and don't need the distance aid.

If you were going to buy one set for the rest of your life (very unlikely unless you're 40+), you should get graphite. As you get older your swing speed will slow, and you may get arthritis in your hands, and you'll appreciate the lighter weight. But if you're young and just starting out, no question steel is the way.

Pretty sure the steel is $540, graphite is $580.