The Ketchum Model 400 Tattooer is ideal for cattle, large pigs, buffalo, camels and other large wildlife. Model 400: 10mm (13/32") character size with Ketchum chisel points. Holds up to 4 characters in one row. Fast / easy tattoo character change. Variety of sizes available to meet your needs. Comfort grip for easy long term use. Proven over decades of use. Characters specifically designed to produce easy to read tattoo. Strong spring for quick release.