Premium Grip Training Tool: The gold standard of grippers, this is the single best tool for increasing grip/hand strength Top-Quality Construction: Features proprietary spring technology with knurled aircraft grade billet aluminum handles Legendary Build Quality: Durable, precise and gorgeous Progressive Resistance Levels: Available in 11 different strengths, providing a custom fit from rank beginner to World's Strongest Man American Craftsmanship: Made in the USA by IronMind, the trusted leader in grip strength equipment since 1988 Versatile Training Applications: Suitable for grip strength specialists, competitive athletes, fitness enthusiasts, rock climbers, martial artists, special forces, hand gun shooters and anyone looking to improve hand and grip strength Professional Grade Equipment: Transforms grip training from basic exercise into serious strength development with precision-engineered, progressive resistance - backed by the top training support and customer service in the industry The gold standard for building and testing grip strength, Captains of Crush (CoC) Grippers are designed for maximum progress in minimum time. The world leader for over 20 years, CoC Grippers use premium materials and are made in the USA. 11 strengths for a perfect fit, whether you are a rank beginner or a World's Strongest Man winner, CoC Grippers are the single most important grip strength tool you can choose.