Create natural-looking. defined brows with Kevyn Aucoin The Precision Brow Pencil. Enhance and define your brows with this ultra-slim. dual-ended retractable pencil. Its precise tip allows you to sketch fine. hair-like strokes for a fuller. natural-looking finish. while the built-in spoolie helps groom and style your brows to perfection. The highly pigmented. smudge-resistant formula stays in place throughout the day. ensuring your brows look flawless from morning to night. Lightweight and easy to use. it glides smoothly to deliver effortless control for shaping and sculpting.