(Stone Manufacturing Company) The most popular tattoo used by leading Breeders and Associations. Precision made of a special aluminum alloy-very sturdy, yet lightweight, making it exceptionally easy to handle. Holds up to four digits with no blank digits necessary. The positive ear release prevents the points of the digits from scratching or blurring the tattoo mark. Outfit consists of plier, set of 3/8" digits (0-9) and 3 oz. jar of ink.