The blade golf iron is a classical club with a thin top-down look, a smaller sweet spot, and an impressive feel that is primarily used by skilled golfers. Or cavity back irons, which are larger than blades and have a hollow section at the club's bottom. Cavity backs have a larger sweet spot, are more forgiving, and produce more distance. A muscle back iron has a more traditional appearance and is also known as a forged club. The club's head is quite narrow, but the base is thicker, which increases forgiveness and allows the ball to fly higher. Low handicap golfers are more likely to use these irons.