This little tool is amazing. It's so great to contour and shape your eyebrows with precision. Sometimes I don't have time to tweeze and I whip out this baby and in less than a minute I have perfectly groomed eye brows. It's small enough that you can really use it to shape your arch without worrying about taking half your eyebrow off. The razors do dull over time, like with any razor but it's worth buying it over again.