Cobra’s KING F9 Speedback™ One Length irons share all the same features of their variable length counterpart, the KING F9 Speedback™ irons. As the model name suggests, the difference is in the length. Read on to find out about these irons.
Speedback™ Technology

Cobra uses its new Speedback™ technology in the KING F9 Speedback™ One Length irons. This technology adds mass to the sole of the club, pushing the CG low for easy launch and added forgiveness. The mass doesn’t give the irons a bulky look and actually helps with turf interaction.
One Length Configuration

Each iron in KING F9 Speedback One Length iron set is built to 7-iron length, lie angle, and swing weight. Building the clubs like this promotes a single setup and swing and is designed to produce more overall consistency to help lower scores.
Co-Molded Medallion

On the 4-7 irons, Cobra uses a Co-molded medallion to dampen vibrations and give the clubs a soft feel. The 3-piece medallion is made with aluminum, TPU and acrylic foam.
Forged E9 PWRSHELL™ Face Technology

The face of the KING F9 Speedback One Length irons has forged E9™ technology, which varies the thickness across the face, increasing ball speed on off-center hits and expanding the sweet spot.
The face also utilizes the company’s PWRSHELL™ tehcnology, where the face wraps around to the sole of the club, creating a channel that flexes in and out at impact. This reaction creates higher ball speed and launch angles.
Progressive Shaft Weighting
Cobra uses 3 different KBS shafts with different weights in the KING F9 Speedback One Length irons. The progress from a KBS Tour 80, to KBS Tour 90, to KBS Wedge shafts. Using this shaft setup creates the perfect launch and feel in each club.
Cobra Connect

Each club in the Cobra KING F9 family has Cobra Connect powered by Arccos sensors in the grip. The sensor tracks distance, accuracy, and more automatically. The data collected gets sent to the Arccos Caddie app, showing you areas that you’re doing well and what you can work on to improve your game.
The following chart lists the stock specs for the Cobra F9 Speedback irons.
