The golf weight ring is made of high quality steel and rubber for durability. Outer Diameter: 6cm/2.36 inches; Inner Diameter: 4cm/1.57 inches. Soft polymer coating prevents swing weight from scratching your golf club. Works with all golf clubs: drivers, woods, hybrids, irons, etc. Package contains: 1 x golf weight ring. Name: Golf Weighted Ring. Product material: metal and elastic glue. Color: black, orange. Outer Diameter: 6cm/2.36 inches Inner Diameter: 4cm/1.57 inches Features: Use golf swing weights to help strengthen golf swing muscle memory, increasing flexibility, strength, distance, and control during practice, training, or warm-up. Slide grips and club shafts to increase swing weight and improve your golf skills. This is a great accessory for golfers, you can use it on any woods or irons, it won't scratch your head, it doesn't take up much space, it fits easily in your golf bag, So always available. The package contains:1PCS* Golf Weight Ring.