Gosh Brow Hair Stroke Pen creates hair-like strokes to shape natural-looking eyebrows. It allows thin to thick lines for a semi-permanent effect. The applicator includes a precision nib and a brush to mimic real hairs for a soft finish. Shade 001 Brown is a warm, versatile tone suitable for most brows. To use, apply light, hair-like strokes along your brow shape, layering for intensity.