Quick, easy to use and chemical-free, the revolutionary Nitty Gritty NitFree comb is the most effective way to remove and destroy lice, eggs (unhatched lice) and nits (empty, hatched egg shells). The NitFree comb removes and destroys 100% of all lice and eggs with its patented microgrooved steel teeth. These special teeth run through any kind of hair smoothly and safely to avoid cutting or pulling the hair, and the teeth's rounded ends penetrate all the way to the scalp to remove even the tiniest nit quickly and easily, without scratching or hurting.