As was the case with the recently released King SZ driver, Cobra Golf turned to Formula 1 racing for inspiration in developing its SZ irons. Again, the primary goal was to maximize speed in an effort to maximize distance (SZ stands for Speedzone), and company officials say they found ways to do that through five zones of iron design.
For the Light Zone, they used two carbon-fiber inserts in place of steel on the top line, which allowed them to reposition 3 grams of discretionary weight and lower the center of gravity in an effort to bolster ball speed and launch. In the Stability Zone, Cobra engineers used Speedback shaping to produce a wider body design around the perimeter of the club, also for lower CG and an increased moment of inertia, which improves forgiveness.
The company’s patented Pwrshell technology is employed for the Power Zone and included to promote higher launch and increase ball speed throughout the set. Then, there is a Feel Zone, where Cobra adds a co-molded medallion system that dampens vibrations for better sound and feel, even on off-center strikes.
As for the Spin Zone, that is where technicians turn to progressive spin technology that is 100-percent CNC milled, with V-grooves used for the 4-6 irons, U-grooves on the 7-PW and wedge-based grooves for the GW and SW clubs.
These irons are offered in two versions. One is made up of variable-length sticks that feature a progressive construction design. And the other is a one-length set with matched lengths (37½ inches), head weights and swing weights that is designed to promote a repeatable set-up and swing.
Like other members of the King SZ family these irons employ Cobra Connect tracking, from Arccos, that uses electronically embedded sensors in the grip to automatically record the distance and accuracy of each shot.