TaylorMade M4 Irons 2021 Carbon Shaft 6-Piece Set - Club Numbers: / 5, 6, 7, 8, 9, PW - Shaft / Fujikura Atmos Red ▼ M4 Irons (Excerpt from introduction HP) Global spec of the M4 irons released in February 2018. The M4 irons specialize in distance & forgiveness, and with a pocket cavity and thick sole, they are easy to avoid hitting the ground before the ball, and will fly even with a sweeping swing. Popular irons released as a global spec, 4 years after their initial release. Thank you for viewing. Series...M Series Series...M4 Dexterity...Right-handed