Arguably the most technologically advanced iron in Srixon’s line, the ZX4 Mk II brings all the power one could want. The cast, multipiece hollow-body iron features a forged high-strength steel face insert that has the ball coming out of the blocks like an Olympic sprinter. That’s not just from the springy metal though. Srixon used a supercomputer to simulate thousands of impacts, and a variable-thickness face pattern was milled into the backside of the face insert to maximize ball speed.The long and middle irons—to the 7-iron—have wider and shallower grooves, and the grooves in the short irons are narrower and deeper to optimize spin.

• Sole width is slimmer to be more in line with ZX5 Mk II to make blending sets easier.
• Tungsten in the toe area of the long and middle irons optimizes CG location and increases stability.
• A forged high-strength steel face insert creates more deformation at impact.
• 7-iron: 28.5 degrees; PW: 43 degrees

ZX5 Mk II

Some irons in this category go heavy on the distance and light on the players. This one is the right combination of both. A slim hosel provides a pleasing visual at address, and the offset produces a natural flow through the set—both small enhancements better players will appreciate. The face has plenty of sizzle thanks to the use of a forged SUP10 steel plate featuring a variable-thickness pattern of grooves, channels and cavities milled into the back of the iron face to maximize rebound at impact.

• The 8-iron through pitching wedge have a shorter blade height to assist shotmaking
• The KBS Tour Lite stock shaft is lightweight enough to help you speed through the impact zone.
• 7-iron: 31 degrees; PW: 44 degrees