The Genuline 6 Regular curved needle is used for delicately etching individual hair strokes into eyebrows. This technique is sometimes referred to as microstroking, microblading, feathering, embroidery, or microetching. An online class for professionals on the genuline needle technique is available at www.bodyartclasses.com The 6 Fine is the most flexible needle for this technique. It is great for superfine hair strokes on normal-delicate skin! Perform 1-3 strokes, with optional taps at the base of each hair for gorgeous realistic hairs!