Used Ping Karsten TR Iron Sets

True Roll mills grooves that run deepest at the centre of the face and shallower toward the edges, so a strike off the toe leaves the ball at close to the same speed as one from the middle. Ping matched the heads to stroke types: Anser 2, B60 and Pal for a slight arc, Anser 5 for a straight stroke, Zing for a strong arc.