Mizuno jpx900 hot metal irons mizunorsquos newest material chomoly 4140m ndash is introduced in the jpx900 hot metal which combines offensive ball speeds with the adjustability of a forged iron the secret to this groundbreaking new material is its versatility which not only paves the way to mizunorsquos thinnest ever cup face for phenomenal distance but also remains soft and bendable in the hosel for precise lie angle adjustments the wedges also have their own mate