black reverse culatta double keychainthe keychain has been hand cut from a butter soft full grain washed and tumbled 3. 2mm vegetable tanned reversed culatta leather with a rotten corpse matte black dye treatment implemented over 24 hours. culatta is a special cut combined of the rear just above the cordovan, the belly middles and the hind shanks, offering a dense structure, tight grain and medium to firm temper. vegetable tanning is a traditional method of treating the hide using