KING F9 ONE LENGTH

ONE SWING
FOR EVERY SHOT.

With one setup and one swing, you can simplify the entire process and swing every iron with confidence like it's your trusty 7-iron.

KING F9 RICKIE FOWLER
KING F9 BRYSON DECHAMBEAU

SIMPLIFY YOUR GOLF GAME

In a traditional variable length iron set, certain variables including ball position and foot position change as you transition between your longer and shorter irons, causing more room for error. With ONE Length, these variables are eliminated, allowing you to focus less time on your setup and more time on the shot that lies ahead.

Variable Length Stance
Variable Length
One Length Stance
One Length

WHAT MAKES ONE LENGTH WORK?

One Length Clubs

HEAD CONSTRUCTION

Each ONE Length iron and hybrid club head is re engineered to match 7-iron head weight to promote consistent distance gapping and feel through the set.

SHAFT CONSTRUCTION

Graphite and steel shafts feature adjusted flex profiles to promote higher launch in the long irons and lower, more controlled trajectories in the short irons and wedges.

7-IRON CONFIGURATION

Each club in the set is constructed to match 7-iron length and swing weight specifications to deliver a smooth transition between your long irons and wedges.

ONE LENGTH IRON CONSTRUCTION

LONG IRON
CONSTRUCTION

(4 iron - 6 iron)

Since the long irons have a shorter shaft, we have to add head weight to match 7-iron swing weight. The comparison on the right illustrates where we add weight to the ONE Length 5-iron as an example. This lowers the CG and increases inertia (MOI) to produce increased clubhead speed, launch and distance.

One Length Long Irons

MID IRON
CONSTRUCTION

(7 iron)

The ONE Length 7-iron utilizes the same construction as the variable length 7-iron, illustrated in the image on the right. From the 8-iron to the wedges, we progressively remove more head weight so that each club matches the head weight and swing weight of a 7-iron through the set. Conversely, we progressively add more head weight as we go from the 7-iron to the 4 iron.

One Length Mid Irons

WEDGE
CONSTRUCTION

(GW - SW)

Since the short irons (8i-PW) and wedges (GW-LW) have a longer shaft, we have to remove head weight to match 7-iron swing weight. This is accomplished by using a hollow cavity in the sole, shown in the wedge on the right, which helps raise the CG and reduce the inertia to promote lower launch and more controlled trajectories.

One Length Short Irons

ONE LENGTH.TM
ONE STEP FURTHER.

PROGRESSIVE SHAFT WEIGHTING

The KING F9 SPEEDBACK irons are equipped with three different aftermarket KBS shafts in varying weights. Ultralight KBS Tour 80 shafts in the 4-6 promote high launch, KBS Tour 90 shafts in the 7-9 promote high, but controlled ball flights, and KBS Wedge shafts in the GW-SW promote lower trajectories for more accuracy around the green.

One Length Shafts
LONG IRONS MADE EASY

An all new SPEEDBACK design adds more mass low and wide in the long irons compared to a conventional game-improvement iron, delivering the best combination of low CG and high MOI for high, towering shots.

One Length Long Irons Trajectories
A SHORT GAME YOU CAN BRAG ABOUT

An all new cavity-back wedge design with specialty wedge sole shaping delivers more forgiveness without sacrificing versatility for shot shaping around the green. Stouter KBS Wedge shafts provide lower, controlled trajectories for attacking pins.

One Length Short Irons Trajectories

CONSISTENCY
PUT TO THE TEST

LONG IRONS

Many golfers lack consistency and forgiveness with their variable length long irons. ONE Length, as seen in the GEARS test below, can help promote more control and more centered contact on the face, resulting in more consistent distance, launch and feel.

Variable Length 5 Iron
Variable Length 5i Facemap
One Length 5 Iron
One Length 5i Facemap
MID IRONS

Improvements in consistency are even noticed in the ONE Length 7-iron compared to the variable length 7-iron. This proves that having one repeatable set up and swing from your long irons to wedges, can translate into improved consistency with the clubs you already feel comfortable with.

Variable Length 7 Iron
Variable Length 7i Facemap
One Length 7 Iron
One Length 7i Facemap
SCORING IRONS

The GEARS test below compares the face impact dispersion of the variable length pitching wedge to the ONE Length pitching wedge. Despite the longer shaft length, the ONE Length wedge produces more consistent contact, resulting in more precision on shorter shots.

Variable Length Pitching Wedge
Variable Length PW Facemap
One Length Pitching Wedge
One Length PW Facemap