Features: By extending the shafts, help player adjust the appropriate grip length and optimize hitting distance and direction control. Light weight and high strength, reducing the burden on the swing and improving comfort. Make from plastic steel, these golf shafts extension rods are designed to provide long terms performances. Suitable for both steel and carbon shafts, these extension rods can used with a variety of golf clubs, including iron, wood, and putters. Easy to install, enabling you to quickly and accurately adjust the length of your golf clubs golf positioning rod connectors. Specifications: Component: Plastic steel size: 1/2/3/4/5/6/7/8/9/10/11 1 outer diameter: 12.32mm/0.485inch 2 outer diameter: 12.45mm/0.49inch 3 outer diameter: 12.58mm/0.495inch 4 outer diameter: 12.7mm/0.5inch 5 outer diameter: 12.90mm/0.508inch 6 outer diameter: 13.081mm/0.515inch 7 outer diameter: 13.27mm/0.522inch 8 outer diameter: 13.46mm/0.53inch 9 outer diameter: 13.85mm/0.545inch 10 outer diameter: 14.23mm/0.56inch 11 outer diameter: 14.605mm/0.575inch Package Includes: 10Pcs Golf Club shafts Extension note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.