What it is The Line Brush creates clean, sharp lines for brows and eyes. How you use it Use the angled, flat end for creating thin, hair-like strokes to fill your brows or to line your eyes with precision. Use the spoolie end to blend and set your brows for a flawless finish. Why it’s better Achieve the microblade perfection you’ve been looking for with this double-ended brush that gets those brows on fleek.