Founded in 2012, Kevos has ordinary A-type grip and R-type grip products, but the first to recommend is its super grip 859, which is transformed from the traditional Bruce Lee grip device, which is a new grip device that is different from other brands.
 
In order to facilitate the exercise of his grip strength and arm strength, Bruce Lee developed an indoor grip device that uses steel as a bracket and realizes the increase or decrease of weight through the placement of dumbbell plates, which is also called an arm grip. The Kaivos 859 is based on the principle of Bruce Lee's grip device, changing the large steel bracket to a small steel sheet, and replacing the dumbbell plate with a detachable spring, so as to create a super grip device, which can provide 50-1000 pounds (about 23kg-454kg) of grip strength, which is very suitable for advanced and professional fitness professionals, but it is not recommended for novices to buy and use it when the foundation is insufficient.
 
Kaivos 859 is priced at 102-147 yuan, compared with the common A-type and R-type grip devices on the market, its material is more solid and durable, but the portability is poor, and it is more suitable for indoor grip exercises. Kevos also has two other grip devices, namely Type A and Type R, priced at 32 and 26 yuan, but compared with brands such as Xinyi Wanjia and Swelldom, the cost performance is not outstanding.