No cattle rancher worried that a mad cow could be traced to his herd should be without one! Super Knife "will remove ear tags quickly and easily, It is a lightweight, handheld tool made of plastic. It contains two razor thin blades and can be easily carried in your pocket. Tags are removed by sliding the hooked end of the tool containing the two razor knives across the stem of the tag. The user is protected from the blades by the Blade Guard cover. The tag cannot be reused once the stem is cut."