The Matrix MFS 58+ Iron shaft has the senior golfer in mind. It's weighted as low as 58 grams, but has a high kick point, and a high spin rate. Since it's torqued down and has a firm tip stiffness, the MFS 58+ Iron Shaft has a very smooth, powerful kick through impact.

FLEX	WEIGHT	TORQUE	LAUNCH	SPIN	LENGTH	TIP OD	TIP PAR
L, A	58.0	3.1	HIGH	HIGH	40.0	0.335	4.5
R, F	60.0	2.8	HIGH	HIGH	40.0	0.335	4.5
S	62.0	2.7	HIGH	HIGH	40.0	0.335	4.5