The Ketchum 201A Two-Row Ear Tattooer is an Industry Standard. The 201A holds up to 8 characters in 2 rows (4 characters per row). Great for sheep and beef producers. Rapid character exchange in either row as the bottom row changes with a split pin. The top row changes with the convenient lever locking bar. The 201 series tattooers use an 8mm (5/16") size character. Each plier features the special Ketchum chisel point pin, which gives illusion of a continuous line character.