Chin Na is a Chinese term describing techniques used in the Chinese martial arts that control or lock an opponent’s joints or muscles/tendons so he cannot move, thus neutralizing their fighting ability. Chin Na training stones are one of the older training tools used in ancient China for building finger strength. These conical stone weights are gripped by the fingers and lifted, since their surface is quite smooth, even the White Stones are challenging to begin with. Chin Na Grip bags can also be found here. True Brass Forearm Rings in the Chin Na section are scarce and over the years we have had countless requests for these hard-to-find items. Past manufacturers have stopped production of these rings, so we had to have them specially made in China just for you! Used by many traditional Kung Fu schools, such as Hung Gar, these rings are worn on your forearms as you practice your forms. Not only do they add weight to build up your arm muscles, they harden your forearms for serious blocking!