Callaway Rogue ST Max, Rogue ST Max OS, Rogue ST Pro irons

Callaway has used 17-4 stainless steel to create iron faces for several years, but the Rogue ST’s cup-face design is created using a high-strength 450 stainless steel. Callaway said it is a harder material, so the faces could be made thinner. The face of each iron also was created using artificial intelligence, with a supercomputer running thousands of simulations on different designs to learn which one produces the most ball speed for each iron. In other words, the cup face of the 5-iron is slightly different than the 8-iron, with each face designed to optimize the performance of each club.

Callaway said the combination of 450 stainless steel and the AI-designed cup face should create more ball speed, even on mis-hits.

Tungsten in the toe area lowers the CG location and pulls it into the center of the hitting area. (Callaway)

Behind the hitting area, Callaway added an internal tungsten weight to each head. The weight, which is positioned low and in the toe area, varies by club but goes up to 62 grams. It helps counteract the weight of the hosel, pull the ideal hitting area into the center of the face and drive the center of gravity down and back. That should encourage a higher launch and a steeper angle of descent for increased stopping power on the greens.