Features: Specially for enhances wrist strength, help improve grip strength and endurances, and enhances muscle strength in the wrist area. Equipped with a rotating handle, makes training smoother and effectively exercises wrist joint flexibility and stability. Bold processing provide good grip and nonslip effect, ensuring comfort and safety during training. Make of durability materials with strong load bear capacity, reliable and suitable for long-terms and frequent use. Collaborates with other equipment in gym for wrist strength training to enhances hand muscle strength and stability. Specifications: Material: Metal Diameter: 6cm (2.36inch)/4cm (1.57inch) Package Includes: 1x Hand Grip 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.