A Simple Ear Punch is commonly used in a laboratory setting for tagging rodents for easy identification. Ear punches can create a distinctive hole or pattern in the ear of a rodent. Ear punches are relatively non-invasive compared with ear tags, tattoos, and other methods. They create a hole in the ear without causing significant harm or discomfort to the animal. Ear punches permanently mark your rodents, without ever fading or require further maintenance. You can easily identify individual animals throughout their lifespan. The distinctive pattern of the ear punch can be easily seen and identified by laboratory personnel. Ear punches are relatively inexpensive compared to other tagging methods. Our Simple Ear Punches are reusable, reducing ongoing costs associated with tagging rodents. You can choose from 1mm or 2mm hole diameter. Two 2mm punches are available, one is 5.7cm (2.25") long and the other is 5.5cm (2.2") long.