Contact drifts high and toward the toe, and on a conventional wedge profile, that's right about where the grooves stop.

So Callaway extended them with the help of Spin Gen 2.0 grooves that run heel to toe across the face, with the pitch spacing tightened by 17 degrees, which the company says amounts to 44 percent more groove area than a conventionally shaped wedge.

The elongated toe also created room to move mass. Callaway's Spin Pocket construction (the largest pocket the company has built, 18 percent bigger than Opus SP+) pulls material out of the bottom of the head and relocates it up the face, producing the highest wedge center of gravity (CG) in Callaway's history. Square the face and the CG sits above the strike, holding launch down and spin up. Open it, and contact climbs closer to the center of mass while the head's offset adds launch back.