Eyebrow Line Marker Ruler for precise eyebrow design, suitable for beginners, embroidery artists, makeup professionals, and use. The bow shaped aluminum ruler with a center horizontal observation device helps position and draw symmetrical eyebrow shapes quickly and accurately. Key benefits accuracy: Bow shaped level measuring ruler with a horizontal observation device improves alignment and symmetry for consistent eyebrow templates. Clean and controlled leveling: Sealed thread box holds the cotton thread and level liquid capacity 1 ml, reducing spills and desktop mess while allowing controlled use. Replaceable and hygienic: Cotton thread is replaceable for safer and cleaner operation. End locks keep the thread secure during setup. Compact and adjustable: Foldable design stores flat without taking space. Central screw lets you fine tune ruler size for different face shapes. Simple setup: Minimal parts and a locking mechanism make installation and fixation fast and convenient, useful for both practice and client work. Features Materials: Aluminum ruler, cotton thread. Level liquid capacity: 1 ml. Ruler extended size: Approx. 23 x 7 cm (9.06 x 2.76 in). Ruler folding size: Approx. 10.8 x 5 cm (4.25 x 1.97 in). Design: Bow shaped with center horizontal observation device and locking devices at both ends. Thread storage: Sealed plastic box for the cotton thread to prevent spills and contamination. Adjustment: Middle screw for size adjustment and finer positioning. Package contents 1 x Eyebrow Line Marker Ruler 1 x Thread Coil 1 x Plastic Box Typical use scenarios Salon and studio: Create repeatable, symmetrical eyebrow templates for clients during shaping, embroidery, or microblading preparation. Training and practice: Ideal for beginners learning eyebrow mapping and symmetry techniques. Home and grooming: Help achieve consistent eyebrow shapes for makeup and daily grooming. How to use (brief) Unfold the ruler and adjust the central screw to fit the face width. Place the ruler on the brow area using the horizontal observation device for alignment. Pull a length of cotton thread from the sealed box and lock both ends. Apply leveling liquid as needed to the thread. Snap the thread to mark or map eyebrow points and shape guides. thread when worn for clean results. This ruler combines durable aluminum construction, a replaceable cotton thread system, and a compact folding design to make eyebrow mapping accurate, cleaner, and easier to manage in professional and settings.