M Series Irons The Founders Club M Series Irons are designed to give golfers the ability to hit all the irons in their bag with increased accuracy, confidence, and distance. The M Series Irons match the Hybrid 3 and 4 Iron with a 5-PW set of irons that feature an under cut cavity iron with a Titanium Face. The Titanium Face Irons are one of the longest on the market. Long irons replaced with High MOI 3 and 4 Hybrid Oversized head with progressive offset and slightly wider sole to provide the optimum blend of high launch angle, long, penetrating ball flight and maximum control Perimeter weighting to maximize forgiveness and distance while also increasing the stability and feel of the club