推荐型号：Captains of Crush Hand Gripper
 
IronMind has an unshakable position in the grip grip device market as Apple is in 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 was later imitated by other grip strength device manufacturers, such as Gillingham High Performance, also from the United States, and Xinyi Wanjia grip strength device in China.
 
The homogenization of grip device products is serious, mainly because its technical content is relatively low, there are countless products on the market, and almost all brand manufacturers with production conditions can launch one or two products. The grip device is based on the principle of hand resistance, so the fit between the handle and the palm and the durability of the spring connecting the handle are the most important factors to measure an A-type grip device.
 
The handle of the COC grip device does not have a sponge sleeve or tape configuration, and the experience of using it may be relatively poor, but the light handle design is a popular indicator in the American grip device market, compared with the domestic brand grip device used to put on a layer of sponge sleeve, the COC light handle can achieve a better fit with the palm in use, enhance the slip resistance and exercise the wear resistance of the hand. For many fitness people, the degree of callouse of the palm is actually a side reflection of the fitness situation.
 
The COC grip device is made of strict technical processing, both the handle and the spring have a long service life, and even after years of use, its spring strength can still be maintained in a stable state, which is also one of the reasons why the COC grip device is highly sought after by fitness enthusiasts at home and abroad. The COC grip device is designed with an iron ring in the middle of the handle on both sides, and it is also a point that many users debate whether the design of this iron ring increases the aesthetics or affects the feeling of use.
 
The COC grip device is divided into 7 levels from 1 to 4, every 0.5 levels, ranging from 140 pounds (about 63.5 kg) at the lowest No. 1 to 365 pounds (about 165.6 kg) at the limit No. 4. ONLY FIVE INDIVIDUALS (JOE GINNEY, NATHAN HALL, DAVID MORTON, TOMY HESLIP AND MAGNUS SAMUELSSON) HAVE BEEN OFFICIALLY PROVEN TO HAVE CLOSED COC4, WITH SWEDE MAGNUS SAMUELSSON ALSO SETTING A WORLD RECORD OF 192KG GRIP STRENGTH. In order to cater for exercisers with relatively weak strength, IronMind has since introduced four lower strength grip machines, ranging from 60 pounds (about 27 kg) to 120 pounds (about 54 kg).
 
However, for novice friends, it is recommended to choose a COC grip device with a lower weight class to avoid hand injuries caused by improper force. At present, there is no official sales channel for IronMind in China, and consumers can only buy through overseas shopping and other methods, with the lowest price starting at US$20 (equivalent to about 135 yuan). IronMind also has a miniature version of the grip strength, which is aimed at finger strength exercises, and costs about $23 (equivalent to about 155 yuan).