IronMind United States
Recommended model: Captains of Crush Hand Gripper IronMind has an unshakable position in the grip grip device market as Apple is to the mobile phone market. Like the latter, IronMind is also from the United States, founded in 1988 by Randall J. Strossen, Ph.D. in psychology from Stanford University. In 1991, IronMind officially launched the Captains of Crush series of grip strengths (COC grip devices), a series of A-grip grips with a variety of more precise difficulty levels to choose from, and for the first time to use an aluminum handle and engraved grade scale, these two initiatives have become a common standard for other grip maker brands around the world, and the COC grip device has become a milestone equipment product. In the same year, IronMind also launched the COC Grip Strength Certification Service, after which IronMind awarded a Grip Strength Rating Certificate and included the name of the certifier on its official website (COC Grip Strength Maker Certification List) to recognize the achievement of grip strength training. This certification service has since been replicated by other grip maker manufacturers, such as Gillingham High Performanc, also from the United States.