The product is made of ABS and stainless steel; It has a bang cutter and a ruler; It is easy to use; There are transparent bubble to get the balance; Fasten the bang with the ruler before cut it; Make the ruler horizontal, cut your bang with the cutter in a way of less amount and more times, at last, hold up the cutter to thin your hair to make the line more natural; The bang cutter is used to thin your hair, cut the level; The same way is used to cut wig.